Everything before initial synced list

Signed-off-by: Andrew Opalach <andrew@akon.city>

12 files changed, 202 insertions, 342 deletions

diff --git a/src/codec/ffmpeg/common.c b/src/codec/ffmpeg/common.c
index 57caff7..b7a232e 100644
--- a/src/codec/ffmpeg/common.c
+++ b/src/codec/ffmpeg/common.c
@@ -1,6 +1,38 @@
+#include <al/lib.h>
+#include <al/log.h>
+#include <libavutil/log.h>
+
 #include "common.h"
 
 void camu_ff_set_log_callback(void (*callback)(void *, int, const char *, va_list))
 {
     av_log_set_callback(callback);
 }
+
+static char *av_log_buf = NULL;
+static s32 av_log_pos = 0;
+
+static void av_log_callback(void *userdata, int level, const char *fmt, va_list args)
+{
+    (void)userdata;
+    al_assert(av_log_buf);
+    if (level < AV_LOG_DEBUG) {
+        av_log_pos += al_vsnprintf(&av_log_buf[av_log_pos], 512, fmt, args);
+        if (av_log_buf[av_log_pos - 1] == '\n' || av_log_pos >= 512) {
+            al_log_info("ff_log", av_log_buf);
+            av_log_pos = 0;
+        }
+    }
+}
+
+void camu_ff_set_default_log_callback()
+{
+    av_log_buf = (char *)al_malloc(1024);
+    camu_ff_set_log_callback(av_log_callback);
+}
+
+
+void camu_ff_free_default_log_callback()
+{
+    al_free(av_log_buf);
+}
diff --git a/src/codec/ffmpeg/common.h b/src/codec/ffmpeg/common.h
index ded7b35..229ffb0 100644
--- a/src/codec/ffmpeg/common.h
+++ b/src/codec/ffmpeg/common.h
@@ -1,6 +1,10 @@
 #pragma once
 
 #include <al/types.h>
-#include <libavutil/log.h>
+#include <al/log.h>
 
+// userdata, level, fmt, args
 void camu_ff_set_log_callback(void (*callback)(void *, int, const char *, va_list));
+
+void camu_ff_set_default_log_callback();
+void camu_ff_free_default_log_callback();
diff --git a/src/codec/ffmpeg/decoder.c b/src/codec/ffmpeg/decoder.c
index 7071bea..d231b2f 100644
--- a/src/codec/ffmpeg/decoder.c
+++ b/src/codec/ffmpeg/decoder.c
@@ -1,8 +1,6 @@
-#include <libavutil/cpu.h>
 #include <al/lib.h>
 #include <al/log.h>
-
-//#include "../../render/renderer.h"
+#include <libavutil/cpu.h>
 
 #include "decoder.h"
 
@@ -11,7 +9,8 @@ static void close_internal(struct camu_ff_decoder *av)
     if (av->codec_context) avcodec_free_context(&av->codec_context);
 }
 
-static bool ff_decoder_init(struct camu_decoder *dec, struct camu_renderer *renderer, struct camu_stream *stream)
+static bool ff_decoder_init(struct camu_decoder *dec, struct camu_renderer *renderer, struct camu_codec_stream *stream,
+    void (*callback)(void *, struct camu_codec_frame *), void *userdata)
 {
     struct camu_ff_decoder *av = (struct camu_ff_decoder *)dec;
 
@@ -37,49 +36,45 @@ static bool ff_decoder_init(struct camu_decoder *dec, struct camu_renderer *rend
 
     /*
     s32 cpus = av_cpu_count();
-    cpus = (cpus > 16) ? 4 : cpus / 4;
-    if (cpus == 0) cpus = 1;
+    if (cpus > 4) cpus = 2;
     av->codec_context->thread_count = cpus;
+    av->codec_context->thread_type = FF_THREAD_SLICE;
     al_log_debug("ff_decoder", "Using %i threads for decoder.", cpus);
     */
 
-    (void)renderer;
-    /*
-    if (renderer && renderer->get_buffer2 && codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
+#ifndef CAMU_SINK_NO_VIDEO
+    if (codecpar->codec_type == AVMEDIA_TYPE_VIDEO && renderer && renderer->get_buffer2) {
         av->codec_context->get_buffer2 = renderer->get_buffer2;
         av->codec_context->opaque = renderer->opaque;
     }
-    */
+#else
+    (void)renderer;
+#endif
 
     if (avcodec_open2(av->codec_context, codec, NULL) < 0) {
         al_log_error("ff_decoder", "Failed to open codec (%s).", codec->name);
         goto err;
     }
 
-    if (codec->long_name) {
-        al_log_info("ff_decoder", "Codec: %s (%s) %ldkbps.", codec->name, codec->long_name, codecpar->bit_rate / 1000);
-    } else {
-        al_log_info("ff_decoder", "Codec: %s %ldkbps.", codec->name, codecpar->bit_rate / 1000);
-    }
+    const char *long_name = codec->long_name ? codec->long_name : codec->name;
+    s64 kbps = codecpar->bit_rate > 0 ? codecpar->bit_rate / 1000L : 0L;
+    al_log_info("ff_decoder", "Codec: %s (%s) %ldkbps.", codec->name, long_name, kbps);
 
     av->time_base = stream->av.stream->time_base;
-    av->last_pts = 0;
-    av->last_duration = 0;
+    av->duration = stream->av.stream->duration;
+    //av->last_pts = 0;
+    //av->last_duration = 0;
     //av->seek_pos = -1;
 
+    av->callback = callback;
+    av->userdata = userdata;
+
     return true;
 err:
     close_internal(av);
     return false;
 }
 
-static void ff_decoder_set_callback(struct camu_decoder *dec, void (*callback)(void *, struct camu_frame *), void *userdata)
-{
-    struct camu_ff_decoder *av = (struct camu_ff_decoder *)dec;
-    av->callback = callback;
-    av->userdata = userdata;
-}
-
 static s32 send_packet(struct camu_ff_decoder *av, AVPacket *pkt)
 {
     /*
@@ -92,16 +87,16 @@ static s32 send_packet(struct camu_ff_decoder *av, AVPacket *pkt)
 
     s32 ret = avcodec_send_packet(av->codec_context, pkt);
     if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
-        al_log_error("ff_decoder", "Error sending packet to decoder: (%s).", av_err2str(ret));
+        al_log_error("ff_decoder", "Error sending packet to the decoder: (%s).", av_err2str(ret));
     }
 
     return ret;
 }
 
-static s32 ff_decoder_push(struct camu_decoder *dec, struct camu_packet *packet)
+static s32 ff_decoder_push(struct camu_decoder *dec, struct camu_codec_packet *packet)
 {
     struct camu_ff_decoder *av = (struct camu_ff_decoder *)dec;
-    return send_packet(av, (packet) ? packet->av.pkt : NULL);
+    return send_packet(av, packet ? packet->av.pkt : NULL);
 }
 
 static void ff_decoder_flush(struct camu_decoder *dec)
@@ -114,19 +109,19 @@ static s32 receive_frames(struct camu_ff_decoder *av)
 {
     s32 ret;
     do {
-        struct camu_frame *frame = al_alloc_object(struct camu_frame);
-        frame->type = CAMU_FFMPEG_COMPAT;
+        struct camu_codec_frame *frame = al_alloc_object(struct camu_codec_frame);
+        frame->mode = CAMU_FFMPEG_COMPAT;
         frame->av.frame = av_frame_alloc();
         ret = avcodec_receive_frame(av->codec_context, frame->av.frame);
         if (ret < 0) {
             av_frame_free(&frame->av.frame);
             al_free(frame);
+            // Checking for EAGAIN should prevent an infinite loop.
             if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) break;
-            al_log_error("ff_decoder", "Error receiving packet from decoder: (%s).", av_err2str(ret));
+            al_log_error("ff_decoder", "Error receiving packet from the decoder: (%s).", av_err2str(ret));
             continue;
         }
-        // Track pts and duration of the previous frame so we can handle multiple frames
-        // in a single packet.
+        // Track pts and duration of the previous frame so we can handle multiple frames in a single packet.
         //if (av->codec_context->codec_type == AVMEDIA_TYPE_AUDIO) {
         //    if (frame->av.frame->best_effort_timestamp < 0) {
         //        frame->av.frame->best_effort_timestamp = av->last_pts + av->last_duration;
@@ -158,7 +153,6 @@ struct camu_decoder *camu_ff_decoder_create(void)
 {
     struct camu_ff_decoder *av = al_alloc_object(struct camu_ff_decoder);
     av->dec.init = ff_decoder_init;
-    av->dec.set_callback = ff_decoder_set_callback;
     av->dec.push = ff_decoder_push;
     av->dec.process = ff_decoder_process;
     av->dec.flush = ff_decoder_flush;
diff --git a/src/codec/ffmpeg/decoder.h b/src/codec/ffmpeg/decoder.h
index 45cca00..88bbd4c 100644
--- a/src/codec/ffmpeg/decoder.h
+++ b/src/codec/ffmpeg/decoder.h
@@ -1,7 +1,6 @@
 #pragma once
 
 #include <al/types.h>
-
 #include <libavcodec/avcodec.h>
 
 #include "../codec.h"
@@ -10,10 +9,11 @@ struct camu_ff_decoder {
     struct camu_decoder dec;
     AVCodecContext *codec_context;
     AVRational time_base;
-    s64 last_pts;
-    s64 last_duration;
+    u64 duration;
+    //s64 last_pts;
+    //s64 last_duration;
     //s64 seek_pos;
-    void (*callback)(void *, struct camu_frame *);
+    void (*callback)(void *, struct camu_codec_frame *);
     void *userdata;
 };
 
diff --git a/src/codec/ffmpeg/demuxer.c b/src/codec/ffmpeg/demuxer.c
index 9b26596..7ff0dca 100644
--- a/src/codec/ffmpeg/demuxer.c
+++ b/src/codec/ffmpeg/demuxer.c
@@ -3,7 +3,7 @@
 #include "demuxer.h"
 #include "avio.h"
 
-#define BUF_SIZE 16384
+#define DEMUX_BUF_SIZE (4096 * 4)
 
 static void close_internal(struct camu_ff_demuxer *av)
 {
@@ -28,16 +28,16 @@ static bool ff_demuxer_init(struct camu_demuxer *demux, struct cch_handle *handl
         goto err;
     }
 
-    u8 *buf = (u8 *)av_malloc(BUF_SIZE);
-    av->io_context = avio_alloc_context(buf, BUF_SIZE, 0, handle, camu_avio_read, NULL, camu_avio_seek);
+    u8 *buf = (u8 *)av_malloc(DEMUX_BUF_SIZE);
+    av->io_context = avio_alloc_context(buf, DEMUX_BUF_SIZE, 0, handle, camu_avio_read, NULL, camu_avio_seek);
     if (!av->io_context) {
         al_log_error("ff_demuxer", "Failed to create custom io context.");
         goto err;
     }
 
     if (!cch_handle_can_seek(handle)) {
-        // This should always be unset if we know we cannot seek.
-        // But, should also never be unset if we *do* want to seek because it
+        // AVIO_SEEKABLE_NORMAL should always be unset if we know we cannot seek.
+        // However, it should also never be unset if we *do* want to seek because it
         // disables long seeks (Not tested in a long time).
         av->io_context->seekable &= ~AVIO_SEEKABLE_NORMAL;
     } else {
@@ -47,12 +47,19 @@ static bool ff_demuxer_init(struct camu_demuxer *demux, struct cch_handle *handl
     av->format_context->pb = av->io_context;
     av->format_context->flags |= AVFMT_FLAG_CUSTOM_IO;
 
-    if (avformat_open_input(&av->format_context, "", 0, 0) < 0) {
+    AVDictionary *opts = NULL;
+    av_dict_set(&opts, "analyzeduration", "10000000", 0);
+    av_dict_set(&opts, "probesize", "20M", 0);
+
+    if (avformat_open_input(&av->format_context, "file:", NULL, &opts) < 0) {
         al_log_error("ff_demuxer", "Failed to open input.");
+        av_dict_free(&opts);
         goto err;
     }
 
-    if (avformat_find_stream_info(av->format_context, 0) < 0) {
+    av_dict_free(&opts);
+
+    if (avformat_find_stream_info(av->format_context, NULL) < 0) {
         al_log_error("ff_demuxer", "Failed to find stream info.");
         goto err;
     }
@@ -70,6 +77,7 @@ static bool ff_demuxer_init(struct camu_demuxer *demux, struct cch_handle *handl
     for (u32 i = 0; i < av->format_context->nb_streams; i++) {
         AVStream *stream = av->format_context->streams[i];
         enum AVMediaType type = stream->codecpar->codec_type;
+        if (type != AVMEDIA_TYPE_AUDIO && type != AVMEDIA_TYPE_VIDEO) type = AVMEDIA_TYPE_UNKNOWN;
         // Try to detect attached images.
         if (type == AVMEDIA_TYPE_VIDEO && GUESS_STREAM_IS_IMAGE(stream)) {
             al_log_info("ff_demuxer", "Guessing that stream #%u is an image.", i);
@@ -83,12 +91,14 @@ static bool ff_demuxer_init(struct camu_demuxer *demux, struct cch_handle *handl
             }
             al_log_info("ff_demuxer", "Setting stream #%u to a duration of %.3fs.", i, stream->duration * av_q2d(stream->time_base));
         }
-        if (stream->start_time < 0) stream->start_time = 0;
+        if (stream->start_time == AV_NOPTS_VALUE) stream->start_time = 0;
         s64 duration = av_rescale_q(stream->duration, stream->time_base, AV_TIME_BASE_Q);
         al_assert(duration >= 0);
         if ((u64)duration > av->duration) av->duration = (u64)duration;
-        al_array_push(av->demux.streams, ((struct camu_stream){
-            .type = CAMU_FFMPEG_COMPAT,
+        al_array_push(av->demux.streams, ((struct camu_codec_stream){
+            .mode = CAMU_FFMPEG_COMPAT,
+            .type = type,
+            .duration = (u64)duration,
             .av.stream = stream
         }));
     }
@@ -106,30 +116,15 @@ err:
     return false;
 }
 
-/*
-static AVStream *av_stream_at_index(struct camu_ff_demuxer *av, s32 index)
-{
-    struct camu_stream *stream;
-    al_array_foreach_ptr(av->demux.streams, i, stream) {
-        if (stream->av.stream->index == index) return stream->av.stream;
-    }
-    return NULL;
-}
-*/
-
 static bool subscribed_to_index(struct camu_demuxer *demux, s32 index)
 {
-    s32 subscribed;
-    al_array_foreach(demux->subscribed, i, subscribed) {
-        if (subscribed == index) return true;
-    }
-    return false;
+    return ((demux->subscribed >> index) & 1);
 }
 
-static s32 ff_demuxer_get_packet(struct camu_demuxer *demux, struct camu_packet *packet)
+static s32 ff_demuxer_get_packet(struct camu_demuxer *demux, struct camu_codec_packet *packet)
 {
     struct camu_ff_demuxer *av = (struct camu_ff_demuxer *)demux;
-    packet->type = CAMU_FFMPEG_COMPAT;
+    packet->mode = CAMU_FFMPEG_COMPAT;
     s32 ret = 0;
     do {
         ret = av_read_frame(av->format_context, packet->av.pkt);
@@ -160,12 +155,13 @@ static bool ff_demuxer_seek(struct camu_demuxer *demux, u64 pos)
 {
     struct camu_ff_demuxer *av = (struct camu_ff_demuxer *)demux;
     if (pos > av->duration) pos = av->duration;
+    al_assert(pos <= INT64_MAX);
     s64 ts = av_rescale_q((s64)pos, (AVRational){ 1, 1000000 }, AV_TIME_BASE_Q);
     if (av->eof) {
         avformat_flush(av->format_context);
         av->eof = false;
     }
-    if (avformat_seek_file(av->format_context, -1, INT64_MIN, ts, ts, AVSEEK_FLAG_BACKWARD) < 0) {
+    if (avformat_seek_file(av->format_context, -1, INT64_MIN, ts, ts, 0) < 0) {
         return false;
     }
     av->seeked = true;
@@ -184,9 +180,8 @@ static void ff_demuxer_free(struct camu_demuxer **demux)
 struct camu_demuxer *camu_ff_demuxer_create(void)
 {
     struct camu_ff_demuxer *av = al_alloc_object(struct camu_ff_demuxer);
-    av->demux.type = CAMU_FFMPEG_COMPAT;
+    av->demux.mode = CAMU_FFMPEG_COMPAT;
     al_array_init(av->demux.streams);
-    al_array_init(av->demux.subscribed);
     av->demux.init = ff_demuxer_init;
     av->demux.get_packet = ff_demuxer_get_packet;
     av->demux.get_duration = ff_demuxer_get_duration;
diff --git a/src/codec/ffmpeg/demuxer.h b/src/codec/ffmpeg/demuxer.h
index 8327534..68ad03e 100644
--- a/src/codec/ffmpeg/demuxer.h
+++ b/src/codec/ffmpeg/demuxer.h
@@ -3,7 +3,6 @@
 #include <al/types.h>
 #include <al/lib.h>
 #include <al/array.h>
-
 #include <libavformat/avformat.h>
 
 #include "../codec.h"
diff --git a/src/codec/ffmpeg/encoder.c b/src/codec/ffmpeg/encoder.c
index 4617baf..83a8b55 100644
--- a/src/codec/ffmpeg/encoder.c
+++ b/src/codec/ffmpeg/encoder.c
@@ -1,3 +1,5 @@
+#include <al/lib.h>
+#include <al/log.h>
 #include <libavcodec/avcodec.h>
 #include <libavcodec/codec.h>
 #include <libavformat/avformat.h>
@@ -6,13 +8,12 @@
 #include <libavutil/error.h>
 #include <libavutil/frame.h>
 #include <libavutil/samplefmt.h>
-#include <al/lib.h>
-#include <al/log.h>
 
 #include "encoder.h"
 
 #define BITRATE 256000
-#define FRAME_SIZE 20
+#define FRAME_DURATION 20
+#define SAMPLES_PER_FRAME (48000 / 1000.0 * FRAME_DURATION)
 #define CHANNELS 2
 
 static void free_frame_data(struct camu_ff_encoder *enc)
@@ -20,15 +21,6 @@ static void free_frame_data(struct camu_ff_encoder *enc)
     if (enc->frame && enc->frame->nb_samples > 0) av_freep(&enc->frame->data[0]);
 }
 
-static void alloc_frame_data(struct camu_ff_encoder *enc, s32 frame_size)
-{
-    if (enc->frame->nb_samples >= frame_size) return;
-    free_frame_data(enc);
-    s32 nb_channels = enc->frame->ch_layout.nb_channels;
-    av_samples_alloc(enc->frame->data, NULL, nb_channels, frame_size, enc->frame->format, 0);
-    enc->frame->nb_samples = frame_size;
-}
-
 bool camu_ff_encoder_init(struct camu_ff_encoder *enc, char *encoder_name, char *ext)
 {
     al_memset(enc, 0, sizeof(struct camu_ff_encoder));
@@ -51,7 +43,7 @@ bool camu_ff_encoder_init(struct camu_ff_encoder *enc, char *encoder_name, char
     av_channel_layout_default(&enc->codec_context->ch_layout, CHANNELS);
     enc->codec_context->sample_fmt = AV_SAMPLE_FMT_FLT;
     enc->codec_context->bit_rate = BITRATE;
-    enc->codec_context->frame_size = FRAME_SIZE;
+    enc->codec_context->frame_size = SAMPLES_PER_FRAME;
     enc->codec_context->time_base = (AVRational){ 1, enc->codec_context->sample_rate };
     enc->codec_context->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
 
@@ -77,23 +69,17 @@ bool camu_ff_encoder_init(struct camu_ff_encoder *enc, char *encoder_name, char
 
     AVCodecContext *out_codec = enc->codec_context;
 
-    av_channel_layout_copy(&enc->fmt.req_channel_layout, &out_codec->ch_layout);
-    enc->fmt.req_sample_rate = out_codec->sample_rate;
-    enc->fmt.req_format = out_codec->sample_fmt;
-
-    enc->audio_fifo = av_audio_fifo_alloc(enc->fmt.req_format,
-        enc->fmt.req_channel_layout.nb_channels, 1);
-
-    if (!enc->audio_fifo) {
-        al_log_error("ff_encoder", "Failed to alloc fifo.");
-        goto err;
-    }
+    enc->fmt.req.format = out_codec->sample_fmt;
+    enc->fmt.req.sample_rate = out_codec->sample_rate;
+    av_channel_layout_copy(&enc->fmt.req.channel_layout, &out_codec->ch_layout);
+    enc->fmt.req.channel_count = out_codec->ch_layout.nb_channels;
 
     enc->frame = av_frame_alloc();
-    enc->frame->nb_samples = 0;
-    enc->frame->sample_rate = enc->fmt.req_sample_rate;
-    av_channel_layout_copy(&enc->frame->ch_layout, &enc->fmt.req_channel_layout);
-    enc->frame->format = enc->fmt.req_format;
+    enc->frame->format = enc->fmt.req.format;
+    enc->frame->sample_rate = enc->fmt.req.sample_rate;
+    av_channel_layout_copy(&enc->frame->ch_layout, &enc->fmt.req.channel_layout);
+    av_samples_alloc(enc->frame->data, NULL, enc->frame->ch_layout.nb_channels, SAMPLES_PER_FRAME, enc->frame->format, 1);
+    enc->frame->nb_samples = SAMPLES_PER_FRAME;
     enc->frame->pts = 0;
 
     return true;
@@ -104,93 +90,31 @@ err:
 
 void camu_ff_encoder_push(struct camu_ff_encoder *enc, u8 **data, s32 sample_count)
 {
-    s32 alloc_size = av_audio_fifo_size(enc->audio_fifo) + sample_count;
-    if (av_audio_fifo_space(enc->audio_fifo) < alloc_size) {
-        if (av_audio_fifo_realloc(enc->audio_fifo, alloc_size) < 0) {
-            al_assert(false);
-        }
+    al_assert(sample_count == SAMPLES_PER_FRAME * CHANNELS);
+    enc->frame->data[0] = data[0];
+    s32 ret = avcodec_send_frame(enc->codec_context, enc->frame);
+    if (ret < 0 && ret != AVERROR_EOF) {
+        al_log_error("ff_encoder", "Error sending frame to the encoder: (%s).", av_err2str(ret));
+        return;
     }
-    av_audio_fifo_write(enc->audio_fifo, (void **)data, sample_count);
-}
-
-static bool receive_packets(struct camu_ff_encoder *enc)
-{
-    s32 ret;
     AVPacket pkt = { 0 };
-
-    do {
-        ret = avcodec_receive_packet(enc->codec_context, &pkt);
-        if (ret < 0) break;
-        enc->callback(enc->userdata, &pkt);
-    } while (1);
-
-    if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
-        al_log_error("ff_encoder", "Error receiving packet from encoder: (%s).", av_err2str(ret));
-        return false;
-    }
-
-    return true;
-}
-
-static s32 send_frame(struct camu_ff_encoder *enc, AVFrame *in_frame)
-{
-    s32 ret = avcodec_send_frame(enc->codec_context, in_frame);
+    ret = avcodec_receive_packet(enc->codec_context, &pkt);
     if (ret < 0 && ret != AVERROR_EOF) {
-        al_log_error("ff_encoder", "Error sending frame to encoder: (%s).", av_err2str(ret));
+        al_log_error("ff_encoder", "Error receiving packet from the encoder: (%s).", av_err2str(ret));
+        return;
     }
-    return ret;
-}
-
-static s32 read_frame(struct camu_ff_encoder *enc, s32 frame_size)
-{
-    alloc_frame_data(enc, frame_size);
-    return av_audio_fifo_read(enc->audio_fifo, (void **)enc->frame->data, frame_size);
-}
-
-bool camu_ff_encoder_process(struct camu_ff_encoder *enc, bool flush)
-{
-    s32 samples_available = av_audio_fifo_size(enc->audio_fifo);
-    if (samples_available == 0 && flush) {
-        // Flush encoder.
-        send_frame(enc, NULL);
-        receive_packets(enc);
-        // This should guarantee that there are not packets left.
-        return false;
-    }
-
-    s32 frame_size = enc->codec_context->frame_size;
-    if (samples_available == 0 || (samples_available < frame_size && !flush)) {
-        return false;
-    }
-
-    s32 ret;
-    do {
-        if (samples_available < frame_size) frame_size = samples_available;
-        read_frame(enc, frame_size);
-        samples_available -= frame_size;
-        do {
-            ret = send_frame(enc, enc->frame);
-            if (ret < 0) break;
-            if (!receive_packets(enc)) return false;
-        } while (ret == AVERROR(EAGAIN));
-        if (ret < 0) break;
-        enc->frame->pts += frame_size;
-    } while (samples_available > 0);
-
-    // ret < 0 means encoder errored while sending frame.
-    return ret == 0;
+    enc->callback(enc->userdata, &pkt);
+    enc->frame->pts += SAMPLES_PER_FRAME;
 }
 
 void camu_ff_encoder_reset(struct camu_ff_encoder *enc)
 {
     avcodec_flush_buffers(enc->codec_context);
-    av_audio_fifo_reset(enc->audio_fifo);
 }
 
 void camu_ff_encoder_close(struct camu_ff_encoder *enc)
 {
     if (enc->codec_context) avcodec_free_context(&enc->codec_context);
-    if (enc->audio_fifo) av_audio_fifo_free(enc->audio_fifo);
     free_frame_data(enc);
     if (enc->frame) av_frame_free(&enc->frame);
 }
diff --git a/src/codec/ffmpeg/encoder.h b/src/codec/ffmpeg/encoder.h
index 9bfe8ea..c0d953c 100644
--- a/src/codec/ffmpeg/encoder.h
+++ b/src/codec/ffmpeg/encoder.h
@@ -5,16 +5,14 @@
 #include <libavutil/audio_fifo.h>
 #include <libavutil/rational.h>
 
-#include "resampler.h"
+#include "../codec.h"
 
 struct camu_ff_encoder {
     AVCodecContext *codec_context;
     const AVOutputFormat *output_format;
 
-    struct camu_ff_resample_fmt fmt;
-
+    struct camu_resampler_format fmt;
     AVFrame *frame;
-    AVAudioFifo *audio_fifo;
 
     void (*callback)(void *, AVPacket *);
     void *userdata;
@@ -22,6 +20,5 @@ struct camu_ff_encoder {
 
 bool camu_ff_encoder_init(struct camu_ff_encoder *enc, char *encoder_name, char *ext);
 void camu_ff_encoder_push(struct camu_ff_encoder *enc, u8 **data, s32 sample_count);
-bool camu_ff_encoder_process(struct camu_ff_encoder *enc, bool flush);
 void camu_ff_encoder_reset(struct camu_ff_encoder *enc);
 void camu_ff_encoder_close(struct camu_ff_encoder *enc);
diff --git a/src/codec/ffmpeg/packet_ext.c b/src/codec/ffmpeg/packet_ext.c
index 8fe4c39..c0e400d 100644
--- a/src/codec/ffmpeg/packet_ext.c
+++ b/src/codec/ffmpeg/packet_ext.c
@@ -16,6 +16,7 @@ void aki_packet_write_av_codec_parameters(struct aki_packet *packet, AVCodecPara
     AKI_PACKET_WRITE_TYPE(packet, s32, codecpar->width);
     AKI_PACKET_WRITE_TYPE(packet, s32, codecpar->height);
     AKI_PACKET_WRITE_TYPE(packet, AVRational, codecpar->sample_aspect_ratio);
+    AKI_PACKET_WRITE_TYPE(packet, AVRational, codecpar->framerate);
     AKI_PACKET_WRITE_TYPE(packet, enum AVFieldOrder, codecpar->field_order);
     AKI_PACKET_WRITE_TYPE(packet, enum AVColorRange, codecpar->color_range);
     AKI_PACKET_WRITE_TYPE(packet, enum AVColorPrimaries, codecpar->color_primaries);
@@ -23,18 +24,13 @@ void aki_packet_write_av_codec_parameters(struct aki_packet *packet, AVCodecPara
     AKI_PACKET_WRITE_TYPE(packet, enum AVColorSpace, codecpar->color_space);
     AKI_PACKET_WRITE_TYPE(packet, enum AVChromaLocation, codecpar->chroma_location);
     AKI_PACKET_WRITE_TYPE(packet, s32, codecpar->video_delay);
+    AKI_PACKET_WRITE_TYPE(packet, AVChannelLayout, codecpar->ch_layout);
     AKI_PACKET_WRITE_TYPE(packet, s32, codecpar->sample_rate);
     AKI_PACKET_WRITE_TYPE(packet, s32, codecpar->block_align);
     AKI_PACKET_WRITE_TYPE(packet, s32, codecpar->frame_size);
     AKI_PACKET_WRITE_TYPE(packet, s32, codecpar->initial_padding);
     AKI_PACKET_WRITE_TYPE(packet, s32, codecpar->trailing_padding);
     AKI_PACKET_WRITE_TYPE(packet, s32, codecpar->seek_preroll);
-    AKI_PACKET_WRITE_TYPE(packet, AVChannelLayout, codecpar->ch_layout);
-}
-
-void aki_packet_write_av_rational(struct aki_packet *packet, AVRational rational)
-{
-    AKI_PACKET_WRITE_TYPE(packet, AVRational, rational);
 }
 
 void aki_packet_write_av_codec_id(struct aki_packet *packet, enum AVCodecID codec_id)
@@ -46,15 +42,15 @@ void aki_packet_write_av_stream(struct aki_packet *packet, AVStream *stream)
 {
     AKI_PACKET_WRITE_TYPE(packet, s32, stream->index);
     aki_packet_write_av_codec_parameters(packet, stream->codecpar);
-    aki_packet_write_av_rational(packet, stream->time_base);
+    AKI_PACKET_WRITE_TYPE(packet, AVRational, stream->time_base);
     AKI_PACKET_WRITE_TYPE(packet, s64, stream->duration);
     AKI_PACKET_WRITE_TYPE(packet, s64, stream->start_time);
     AKI_PACKET_WRITE_TYPE(packet, s64, stream->nb_frames);
     if (stream->avg_frame_rate.den == 0) {
         // r_frame_rate.den == 0 handled on the client.
-        aki_packet_write_av_rational(packet, stream->r_frame_rate);
+        AKI_PACKET_WRITE_TYPE(packet, AVRational, stream->r_frame_rate);
     } else {
-        aki_packet_write_av_rational(packet, stream->avg_frame_rate);
+        AKI_PACKET_WRITE_TYPE(packet, AVRational, stream->avg_frame_rate);
     }
 }
 
@@ -68,7 +64,9 @@ void aki_packet_write_av_packet(struct aki_packet *packet, AVPacket *pkt)
     AKI_PACKET_WRITE_TYPE(packet, s32, pkt->flags);
     AKI_PACKET_WRITE_TYPE(packet, s32, pkt->side_data_elems);
     for (s32 i = 0; i < pkt->side_data_elems; i++) {
-        AKI_PACKET_WRITE_TYPE(packet, size_t, pkt->side_data[i].size);
+        // Possibly upcast size_t.
+        s64 size = (s64)pkt->side_data[i].size;
+        AKI_PACKET_WRITE_TYPE(packet, s64, size);
         AKI_PACKET_WRITE_DATA(packet, pkt->side_data[i].data, pkt->side_data[i].size);
         AKI_PACKET_WRITE_TYPE(packet, enum AVPacketSideDataType, pkt->side_data[i].type);
     }
@@ -96,6 +94,7 @@ void aki_packet_read_av_codec_parameters(struct aki_packet *packet, AVCodecParam
     AKI_PACKET_READ_TYPE(packet, s32, codecpar->width);
     AKI_PACKET_READ_TYPE(packet, s32, codecpar->height);
     AKI_PACKET_READ_TYPE(packet, AVRational, codecpar->sample_aspect_ratio);
+    AKI_PACKET_READ_TYPE(packet, AVRational, codecpar->framerate);
     AKI_PACKET_READ_TYPE(packet, enum AVFieldOrder, codecpar->field_order);
     AKI_PACKET_READ_TYPE(packet, enum AVColorRange, codecpar->color_range);
     AKI_PACKET_READ_TYPE(packet, enum AVColorPrimaries, codecpar->color_primaries);
@@ -103,20 +102,13 @@ void aki_packet_read_av_codec_parameters(struct aki_packet *packet, AVCodecParam
     AKI_PACKET_READ_TYPE(packet, enum AVColorSpace, codecpar->color_space);
     AKI_PACKET_READ_TYPE(packet, enum AVChromaLocation, codecpar->chroma_location);
     AKI_PACKET_READ_TYPE(packet, s32, codecpar->video_delay);
+    AKI_PACKET_READ_TYPE(packet, AVChannelLayout, codecpar->ch_layout);
     AKI_PACKET_READ_TYPE(packet, s32, codecpar->sample_rate);
     AKI_PACKET_READ_TYPE(packet, s32, codecpar->block_align);
     AKI_PACKET_READ_TYPE(packet, s32, codecpar->frame_size);
     AKI_PACKET_READ_TYPE(packet, s32, codecpar->initial_padding);
     AKI_PACKET_READ_TYPE(packet, s32, codecpar->trailing_padding);
     AKI_PACKET_READ_TYPE(packet, s32, codecpar->seek_preroll);
-    AKI_PACKET_READ_TYPE(packet, AVChannelLayout, codecpar->ch_layout);
-}
-
-AVRational aki_packet_read_av_rational(struct aki_packet *packet)
-{
-    AVRational r;
-    AKI_PACKET_READ_TYPE(packet, AVRational, r);
-    return r;
 }
 
 enum AVCodecID aki_packet_read_av_codec_id(struct aki_packet *packet)
@@ -131,11 +123,11 @@ AVStream *aki_packet_read_av_stream(AVFormatContext *format_context, const AVCod
     AVStream *stream = avformat_new_stream(format_context, codec);
     AKI_PACKET_READ_TYPE(packet, s32, stream->index);
     aki_packet_read_av_codec_parameters(packet, stream->codecpar);
-    stream->time_base = aki_packet_read_av_rational(packet);
+    AKI_PACKET_READ_TYPE(packet, AVRational, stream->time_base);
     AKI_PACKET_READ_TYPE(packet, s64, stream->duration);
     AKI_PACKET_READ_TYPE(packet, s64, stream->start_time);
     AKI_PACKET_READ_TYPE(packet, s64, stream->nb_frames);
-    stream->avg_frame_rate = aki_packet_read_av_rational(packet);
+    AKI_PACKET_READ_TYPE(packet, AVRational, stream->avg_frame_rate);
     return stream;
 }
 
@@ -152,10 +144,12 @@ AVPacket *aki_packet_read_av_packet(struct aki_packet *packet)
     AKI_PACKET_READ_TYPE(packet, s32, side_data_elems);
     pkt->side_data_elems = 0;
     for (s32 i = 0; i < side_data_elems; i++) {
-        size_t size;
         u8 *data;
         enum AVPacketSideDataType type;
-        AKI_PACKET_READ_TYPE(packet, s32, size);
+        s64 storage_for_size;
+        AKI_PACKET_READ_TYPE(packet, s64, storage_for_size);
+        al_assert((sizeof(size_t) > 4 || storage_for_size <= INT32_MAX));
+        size_t size = (size_t)storage_for_size;
         AKI_PACKET_READ_DATA(packet, size, data);
         AKI_PACKET_READ_TYPE(packet, enum AVPacketSideDataType, type);
         u8 *side_data = av_packet_new_side_data(pkt, type, size);
diff --git a/src/codec/ffmpeg/packet_ext.h b/src/codec/ffmpeg/packet_ext.h
index ff6e337..36b6ed5 100644
--- a/src/codec/ffmpeg/packet_ext.h
+++ b/src/codec/ffmpeg/packet_ext.h
@@ -8,13 +8,11 @@
 #include <libavformat/avformat.h>
 
 void aki_packet_write_av_codec_parameters(struct aki_packet *packet, AVCodecParameters *codecpar);
-void aki_packet_write_av_rational(struct aki_packet *packet, AVRational rational);
 void aki_packet_write_av_codec_id(struct aki_packet *packet, enum AVCodecID codec_id);
 void aki_packet_write_av_stream(struct aki_packet *packet, AVStream *stream);
 void aki_packet_write_av_packet(struct aki_packet *packet, AVPacket *pkt);
 
 void aki_packet_read_av_codec_parameters(struct aki_packet *packet, AVCodecParameters *codecpar);
-AVRational aki_packet_read_av_rational(struct aki_packet *packet);
 enum AVCodecID aki_packet_read_av_codec_id(struct aki_packet *packet);
 AVStream *aki_packet_read_av_stream(AVFormatContext *format_context, const AVCodec *codec, struct aki_packet *packet);
 AVPacket *aki_packet_read_av_packet(struct aki_packet *packet);
diff --git a/src/codec/ffmpeg/resampler.c b/src/codec/ffmpeg/resampler.c
index d4b281a..00418e6 100644
--- a/src/codec/ffmpeg/resampler.c
+++ b/src/codec/ffmpeg/resampler.c
@@ -1,161 +1,108 @@
+#include <al/lib.h>
+#include <al/log.h>
 #include <libavutil/channel_layout.h>
 #include <libavutil/frame.h>
-#include <libavutil/opt.h>
 #include <libavutil/samplefmt.h>
+#include <libavutil/opt.h>
 #include <libswresample/swresample.h>
-#include <al/lib.h>
-#include <al/log.h>
 
 #include "resampler.h"
 
-static bool in_req_matches(struct camu_ff_resample_fmt *fmt)
+static bool ff_resampler_init(struct camu_resampler *resamp, struct camu_resampler_format *fmt)
 {
-    return (fmt->in_format == fmt->req_format) &&
-        (av_channel_layout_compare(&fmt->in_channel_layout, &fmt->req_channel_layout) == 0) &&
-        (fmt->in_sample_rate == fmt->req_sample_rate);
-}
-
-bool camu_ff_resampler_init(struct camu_ff_resampler *resamp, struct camu_ff_resample_fmt *fmt)
-{
-    al_memset(resamp, 0, sizeof(struct camu_ff_resampler));
-
-    fmt->resampler_needed = !in_req_matches(fmt);
-    if (!fmt->resampler_needed) return true;
+    struct camu_ff_resampler *av = (struct camu_ff_resampler *)resamp;
+    al_assert(fmt->resampler_needed);
 
-    camu_ff_resample_fmt_copy(&resamp->fmt, fmt);
-
-    SwrContext *ctx = NULL;
-    s32 ret = swr_alloc_set_opts2(&ctx,
-        &fmt->req_channel_layout,
-        fmt->req_format,
-        fmt->req_sample_rate,
-        &fmt->in_channel_layout,
-        fmt->in_format,
-        fmt->in_sample_rate,
-        0,
-        NULL);
+    camu_audio_format_copy(&av->fmt, &fmt->req);
 
+    s32 ret = swr_alloc_set_opts2(&av->resample_context,
+        &fmt->req.channel_layout, fmt->req.format, fmt->req.sample_rate,
+        &fmt->in.channel_layout, fmt->in.format, fmt->in.sample_rate, 0, NULL);
     if (ret != 0) {
         al_log_error("lav_resampler", "Failed to configure resampler context.");
         return false;
     }
 
+#ifndef _WIN32
     // Slower but more accurate resampler.
-    //av_opt_set_int(ctx, "resampler", SWR_ENGINE_SOXR, 0);
+    av_opt_set_int(av->resample_context, "resampler", SWR_ENGINE_SOXR, 0);
+#endif
 
-    if (swr_init(ctx) != 0) {
-        swr_free(&ctx);
-        al_log_error("lav_resampler", "Failed to open resampler context.");
+    if (swr_init(av->resample_context) != 0) {
+        swr_free(&av->resample_context);
+        al_log_error("lav_resampler", "Failed to init resampler context.");
         return false;
     }
 
-    resamp->resample_context = ctx;
-
     return true;
 }
 
-s32 camu_ff_resampler_sample_count(struct camu_ff_resampler *resamp, s32 in_samples)
-{
-    return swr_get_out_samples(resamp->resample_context, in_samples);
-    //return av_rescale_rnd(swr_get_delay(resamp->resample_context, resamp->fmt.req_sample_rate) +
-    //    in_samples, resamp->fmt.in_sample_rate, resamp->fmt.req_sample_rate, AV_ROUND_UP);
-}
-
-static inline void free_sample_data(struct camu_ff_resampler *resamp)
+static inline void free_sample_data(struct camu_ff_resampler *av)
 {
-    if (resamp->data[0]) av_freep(&resamp->data[0]);
+    if (av->data[0]) av_freep(&av->data[0]);
 }
 
-static inline void alloc_sample_data(struct camu_ff_resampler *resamp, s32 sample_count)
+static inline void alloc_sample_data(struct camu_ff_resampler *av, s32 sample_count)
 {
-    if (resamp->sample_count >= sample_count) return;
-    free_sample_data(resamp);
-    s32 nb_channels = resamp->fmt.req_channel_layout.nb_channels;
-    av_samples_alloc(resamp->data, NULL, nb_channels, sample_count, resamp->fmt.req_format, 32);
-    resamp->sample_count = sample_count;
+    if (av->sample_count >= sample_count) return;
+    free_sample_data(av);
+    s32 nb_channels = av->fmt.channel_layout.nb_channels;
+    av_samples_alloc(av->data, NULL, nb_channels, sample_count, av->fmt.format, 32);
+    av->sample_count = sample_count;
 }
 
-s32 camu_ff_resampler_convert(struct camu_ff_resampler *resamp, const u8 **in_data, s32 in_samples)
+static s32 ff_resampler_convert(struct camu_resampler *resamp, const u8 **in_data, s32 in_samples)
 {
+    struct camu_ff_resampler *av = (struct camu_ff_resampler *)resamp;
     al_assert(in_samples > 0);
-    s32 max_resample_count = camu_ff_resampler_sample_count(resamp, in_samples);
-    alloc_sample_data(resamp, max_resample_count);
-    s32 resample_count = swr_convert(resamp->resample_context, resamp->data,
-        max_resample_count, in_data, in_samples);
+    s32 out_resample_count = swr_get_out_samples(av->resample_context, in_samples);
+    alloc_sample_data(av, out_resample_count);
+    s32 resample_count = swr_convert(av->resample_context, av->data,
+        out_resample_count, in_data, in_samples);
     if (resample_count < 0) {
-        al_log_error("lav_resampler", "Failed to convert samples (%i).", resample_count);
+        al_log_error("lav_resampler", "Failed to convert samples (%d).", resample_count);
     }
     return resample_count;
 }
 
-u8 **camu_ff_resampler_get_data(struct camu_ff_resampler *resamp)
+static s32 ff_resampler_flush(struct camu_resampler *resamp)
 {
-    return (u8 **)resamp->data;
-}
-
-void camu_ff_resampler_close(struct camu_ff_resampler *resamp)
-{
-    if (resamp->resample_context) {
-        swr_close(resamp->resample_context);
-        swr_free(&resamp->resample_context);
+    struct camu_ff_resampler *av = (struct camu_ff_resampler *)resamp;
+    s32 resample_count = swr_convert(av->resample_context, av->data,
+        av->sample_count, NULL, 0);
+    if (swr_init(av->resample_context) != 0) {
+        swr_free(&av->resample_context);
+        al_log_error("lav_resampler", "Failed to re-init resampler context after flush.");
+        return -1;
     }
-    free_sample_data(resamp);
-}
-
-void camu_ff_resample_fmt_copy(struct camu_ff_resample_fmt *dest, struct camu_ff_resample_fmt *src)
-{
-    dest->resampler_needed = src->resampler_needed;
-    dest->in_format = src->in_format;
-    av_channel_layout_copy(&dest->in_channel_layout, &src->in_channel_layout);
-    dest->in_sample_rate = src->in_sample_rate;
-    dest->req_format = src->req_format;
-    av_channel_layout_copy(&dest->req_channel_layout, &src->req_channel_layout);
-    dest->req_sample_rate = src->req_sample_rate;
-}
-
-size_t camu_ff_resample_fmt_bytes_per_sample(struct camu_ff_resample_fmt *fmt)
-{
-    return (size_t)av_get_bytes_per_sample(fmt->req_format);
-}
-
-size_t camu_ff_resample_fmt_samples_to_bytes(struct camu_ff_resample_fmt *fmt, size_t samples)
-{
-    s32 size;
-    s32 ret = av_samples_get_buffer_size(&size, fmt->req_channel_layout.nb_channels, (s32)samples, fmt->req_format, 1);
-    al_assert(ret >= 0);
-    return (size_t)size;
-}
-
-size_t camu_ff_resample_fmt_samples_to_usec(struct camu_ff_resample_fmt *fmt, size_t samples)
-{
-    return samples / (fmt->req_sample_rate / 1000000.0);
-}
-
-f64 camu_ff_resample_fmt_samples_to_sec(struct camu_ff_resample_fmt *fmt, size_t samples)
-{
-    return samples / (f64)fmt->req_sample_rate;
-}
-
-size_t camu_ff_resample_fmt_usec_to_bytes(struct camu_ff_resample_fmt *fmt, size_t usec)
-{
-    size_t samples = usec * (fmt->req_sample_rate / 1000000.0);
-    return samples * (camu_ff_resample_fmt_bytes_per_sample(fmt) * fmt->req_channel_layout.nb_channels);
+    return resample_count;
 }
 
-size_t camu_ff_resample_fmt_sec_to_bytes(struct camu_ff_resample_fmt *fmt, f64 sec)
+static u8 **ff_resampler_get_data(struct camu_resampler *resamp)
 {
-    size_t samples = sec * fmt->req_sample_rate;
-    return samples * (camu_ff_resample_fmt_bytes_per_sample(fmt) * fmt->req_channel_layout.nb_channels);
+    struct camu_ff_resampler *av = (struct camu_ff_resampler *)resamp;
+    return (u8 **)av->data;
 }
 
-size_t camu_ff_resample_fmt_bytes_to_usec(struct camu_ff_resample_fmt *fmt, size_t bytes)
+static void ff_resampler_free(struct camu_resampler **resamp)
 {
-    size_t samples = bytes / (camu_ff_resample_fmt_bytes_per_sample(fmt) * fmt->req_channel_layout.nb_channels);
-    return samples / (fmt->req_sample_rate / 1000000.0);
+    struct camu_ff_resampler *av = (struct camu_ff_resampler *)*resamp;
+    if (av->resample_context) {
+        swr_close(av->resample_context);
+        swr_free(&av->resample_context);
+    }
+    free_sample_data(av);
+    al_free(av);
+    *resamp = NULL;
 }
 
-f64 camu_ff_resample_fmt_bytes_to_sec(struct camu_ff_resample_fmt *fmt, size_t bytes)
+struct camu_resampler *camu_ff_resampler_create(void)
 {
-    size_t samples = bytes / (camu_ff_resample_fmt_bytes_per_sample(fmt) * fmt->req_channel_layout.nb_channels);
-    return samples / ((f64)fmt->req_sample_rate);
+    struct camu_ff_resampler *av = al_alloc_object(struct camu_ff_resampler);
+    av->resamp.init = ff_resampler_init;
+    av->resamp.convert = ff_resampler_convert;
+    av->resamp.flush = ff_resampler_flush;
+    av->resamp.get_data = ff_resampler_get_data;
+    av->resamp.free = ff_resampler_free;
+    return (struct camu_resampler *)av;
 }
diff --git a/src/codec/ffmpeg/resampler.h b/src/codec/ffmpeg/resampler.h
index 4f7b07d..35e1158 100644
--- a/src/codec/ffmpeg/resampler.h
+++ b/src/codec/ffmpeg/resampler.h
@@ -1,40 +1,16 @@
 #pragma once
 
-#include <libswresample/swresample.h>
-#include <libavutil/opt.h>
 #include <al/types.h>
+#include <libswresample/swresample.h>
 
-struct camu_ff_resample_fmt {
-    bool resampler_needed;
-    enum AVSampleFormat in_format;
-    enum AVSampleFormat req_format;
-    s32 in_channel_count;
-    s32 req_channel_count;
-    AVChannelLayout in_channel_layout;
-    AVChannelLayout req_channel_layout;
-    s32 in_sample_rate;
-    s32 req_sample_rate;
-};
+#include "../codec.h"
 
 struct camu_ff_resampler {
+    struct camu_resampler resamp;
     SwrContext *resample_context;
-    struct camu_ff_resample_fmt fmt;
+    struct camu_audio_format fmt;
     u8 *data[AV_NUM_DATA_POINTERS];
     s32 sample_count;
 };
 
-bool camu_ff_resampler_init(struct camu_ff_resampler *resamp, struct camu_ff_resample_fmt *fmt);
-s32 camu_ff_resampler_sample_count(struct camu_ff_resampler *resamp, s32 in_samples);
-s32 camu_ff_resampler_convert(struct camu_ff_resampler *resamp, const u8 **in_data, s32 in_samples);
-u8 **camu_ff_resampler_get_data(struct camu_ff_resampler *resamp);
-void camu_ff_resampler_close(struct camu_ff_resampler *resamp);
-
-void camu_ff_resample_fmt_copy(struct camu_ff_resample_fmt *dest, struct camu_ff_resample_fmt *src);
-size_t camu_ff_resample_fmt_bytes_per_sample(struct camu_ff_resample_fmt *fmt);
-size_t camu_ff_resample_fmt_samples_to_bytes(struct camu_ff_resample_fmt *fmt, size_t samples);
-size_t camu_ff_resample_fmt_samples_to_usec(struct camu_ff_resample_fmt *fmt, size_t samples);
-f64 camu_ff_resample_fmt_samples_to_sec(struct camu_ff_resample_fmt *fmt, size_t samples);
-size_t camu_ff_resample_fmt_usec_to_bytes(struct camu_ff_resample_fmt *fmt, size_t usec);
-size_t camu_ff_resample_fmt_sec_to_bytes(struct camu_ff_resample_fmt *fmt, f64 sec);
-size_t camu_ff_resample_fmt_bytes_to_usec(struct camu_ff_resample_fmt *fmt, size_t bytes);
-f64 camu_ff_resample_fmt_bytes_to_sec(struct camu_ff_resample_fmt *fmt, size_t bytes);
+struct camu_resampler *camu_ff_resampler_create(void);