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Pass AVCodecContext to packet sinks

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Create the codec context from the demuxer, so that it can fill context
data for the decoder and recorder.
pull/3774/head
Romain Vimont 1 year ago
parent 4db50ddbb7
commit 4bdf632dfa
9 changed files with 52 additions and 60 deletions
Show Stats Download Patch File Download Diff File

1
app/src/audio_player.c
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@ -1,5 +1,6 @@
#include "audio_player.h"
#include <libavcodec/avcodec.h>
#include <libavutil/opt.h>
#include "util/log.h"

50
app/src/decoder.c
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@ -12,52 +12,20 @@
#define DOWNCAST(SINK) container_of(SINK, struct sc_decoder, packet_sink)
static bool
sc_decoder_open(struct sc_decoder *decoder, const AVCodec *codec) {
decoder->codec_ctx = avcodec_alloc_context3(codec);
if (!decoder->codec_ctx) {
LOG_OOM();
return false;
}
decoder->codec_ctx->flags |= AV_CODEC_FLAG_LOW_DELAY;
if (codec->type == AVMEDIA_TYPE_VIDEO) {
// Hardcoded video properties
decoder->codec_ctx->pix_fmt = AV_PIX_FMT_YUV420P;
} else {
// Hardcoded audio properties
#ifdef SCRCPY_LAVU_HAS_CHLAYOUT
decoder->codec_ctx->ch_layout =
(AVChannelLayout) AV_CHANNEL_LAYOUT_STEREO;
#else
decoder->codec_ctx->channel_layout = AV_CH_LAYOUT_STEREO;
decoder->codec_ctx->channels = 2;
#endif
decoder->codec_ctx->sample_rate = 48000;
}
if (avcodec_open2(decoder->codec_ctx, codec, NULL) < 0) {
LOGE("Decoder '%s': could not open codec", decoder->name);
avcodec_free_context(&decoder->codec_ctx);
return false;
}
sc_decoder_open(struct sc_decoder *decoder, AVCodecContext *ctx) {
decoder->frame = av_frame_alloc();
if (!decoder->frame) {
LOG_OOM();
avcodec_close(decoder->codec_ctx);
avcodec_free_context(&decoder->codec_ctx);
return false;
}
if (!sc_frame_source_sinks_open(&decoder->frame_source,
decoder->codec_ctx)) {
if (!sc_frame_source_sinks_open(&decoder->frame_source, ctx)) {
av_frame_free(&decoder->frame);
avcodec_close(decoder->codec_ctx);
avcodec_free_context(&decoder->codec_ctx);
return false;
}
decoder->ctx = ctx;
return true;
}
@ -65,8 +33,6 @@ static void
sc_decoder_close(struct sc_decoder *decoder) {
sc_frame_source_sinks_close(&decoder->frame_source);
av_frame_free(&decoder->frame);
avcodec_close(decoder->codec_ctx);
avcodec_free_context(&decoder->codec_ctx);
}
static bool
@ -77,7 +43,7 @@ sc_decoder_push(struct sc_decoder *decoder, const AVPacket *packet) {
return true;
}
int ret = avcodec_send_packet(decoder->codec_ctx, packet);
int ret = avcodec_send_packet(decoder->ctx, packet);
if (ret < 0 && ret != AVERROR(EAGAIN)) {
LOGE("Decoder '%s': could not send video packet: %d",
decoder->name, ret);
@ -85,7 +51,7 @@ sc_decoder_push(struct sc_decoder *decoder, const AVPacket *packet) {
}
for (;;) {
ret = avcodec_receive_frame(decoder->codec_ctx, decoder->frame);
ret = avcodec_receive_frame(decoder->ctx, decoder->frame);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
break;
}
@ -110,9 +76,9 @@ sc_decoder_push(struct sc_decoder *decoder, const AVPacket *packet) {
}
static bool
sc_decoder_packet_sink_open(struct sc_packet_sink *sink, const AVCodec *codec) {
sc_decoder_packet_sink_open(struct sc_packet_sink *sink, AVCodecContext *ctx) {
struct sc_decoder *decoder = DOWNCAST(sink);
return sc_decoder_open(decoder, codec);
return sc_decoder_open(decoder, ctx);
}
static void

2
app/src/decoder.h
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@ -16,7 +16,7 @@ struct sc_decoder {
const char *name; // must be statically allocated (e.g. a string literal)
AVCodecContext *codec_ctx;
AVCodecContext *ctx;
AVFrame *frame;
};

32
app/src/demuxer.c
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@ -160,10 +160,37 @@ run_demuxer(void *data) {
goto end;
}
if (!sc_packet_source_sinks_open(&demuxer->packet_source, codec)) {
AVCodecContext *codec_ctx = avcodec_alloc_context3(codec);
if (!codec_ctx) {
LOG_OOM();
goto end;
}
codec_ctx->flags |= AV_CODEC_FLAG_LOW_DELAY;
if (codec->type == AVMEDIA_TYPE_VIDEO) {
// Hardcoded video properties
codec_ctx->pix_fmt = AV_PIX_FMT_YUV420P;
} else {
// Hardcoded audio properties
#ifdef SCRCPY_LAVU_HAS_CHLAYOUT
codec_ctx->ch_layout = (AVChannelLayout) AV_CHANNEL_LAYOUT_STEREO;
#else
codec_ctx->channel_layout = AV_CH_LAYOUT_STEREO;
codec_ctx->channels = 2;
#endif
codec_ctx->sample_rate = 48000;
}
if (avcodec_open2(codec_ctx, codec, NULL) < 0) {
LOGE("Demuxer '%s': could not open codec", demuxer->name);
goto finally_free_context;
}
if (!sc_packet_source_sinks_open(&demuxer->packet_source, codec_ctx)) {
goto finally_free_context;
}
// Config packets must be merged with the next non-config packet only for
// video streams
bool must_merge_config_packet = codec->type == AVMEDIA_TYPE_VIDEO;
@ -214,6 +241,9 @@ run_demuxer(void *data) {
av_packet_free(&packet);
finally_close_sinks:
sc_packet_source_sinks_close(&demuxer->packet_source);
finally_free_context:
// This also calls avcodec_close() internally
avcodec_free_context(&codec_ctx);
end:
demuxer->cbs->on_ended(demuxer, status, demuxer->cbs_userdata);

10
app/src/recorder.c
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@ -536,9 +536,8 @@ run_recorder(void *data) {
static bool
sc_recorder_video_packet_sink_open(struct sc_packet_sink *sink,
const AVCodec *codec) {
AVCodecContext *ctx) {
struct sc_recorder *recorder = DOWNCAST_VIDEO(sink);
assert(codec);
sc_mutex_lock(&recorder->mutex);
if (recorder->stopped) {
@ -546,7 +545,7 @@ sc_recorder_video_packet_sink_open(struct sc_packet_sink *sink,
return false;
}
recorder->video_codec = codec;
recorder->video_codec = ctx->codec;
sc_cond_signal(&recorder->stream_cond);
sc_mutex_unlock(&recorder->mutex);
@ -601,15 +600,14 @@ sc_recorder_video_packet_sink_push(struct sc_packet_sink *sink,
static bool
sc_recorder_audio_packet_sink_open(struct sc_packet_sink *sink,
const AVCodec *codec) {
AVCodecContext *ctx) {
struct sc_recorder *recorder = DOWNCAST_AUDIO(sink);
assert(recorder->audio);
// only written from this thread, no need to lock
assert(!recorder->audio_disabled);
assert(codec);
sc_mutex_lock(&recorder->mutex);
recorder->audio_codec = codec;
recorder->audio_codec = ctx->codec;
sc_cond_signal(&recorder->stream_cond);
sc_mutex_unlock(&recorder->mutex);

3
app/src/trait/frame_sink.h
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@ -7,8 +7,6 @@
#include <stdbool.h>
#include <libavcodec/avcodec.h>
typedef struct AVFrame AVFrame;
/**
* Frame sink trait.
*
@ -19,6 +17,7 @@ struct sc_frame_sink {
};
struct sc_frame_sink_ops {
/* The codec context is valid until the sink is closed */
bool (*open)(struct sc_frame_sink *sink, const AVCodecContext *ctx);
void (*close)(struct sc_frame_sink *sink);
bool (*push)(struct sc_frame_sink *sink, const AVFrame *frame);

8
app/src/trait/packet_sink.h
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@ -5,9 +5,7 @@
#include <assert.h>
#include <stdbool.h>
typedef struct AVCodec AVCodec;
typedef struct AVPacket AVPacket;
#include <libavcodec/avcodec.h>
/**
* Packet sink trait.
@ -19,8 +17,8 @@ struct sc_packet_sink {
};
struct sc_packet_sink_ops {
/* The codec instance is static, it is valid until the end of the program */
bool (*open)(struct sc_packet_sink *sink, const AVCodec *codec);
/* The codec context is valid until the sink is closed */
bool (*open)(struct sc_packet_sink *sink, AVCodecContext *ctx);
void (*close)(struct sc_packet_sink *sink);
bool (*push)(struct sc_packet_sink *sink, const AVPacket *packet);

4
app/src/trait/packet_source.c
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@ -25,11 +25,11 @@ sc_packet_source_sinks_close_firsts(struct sc_packet_source *source,
bool
sc_packet_source_sinks_open(struct sc_packet_source *source,
const AVCodec *codec) {
AVCodecContext *ctx) {
assert(source->sink_count);
for (unsigned i = 0; i < source->sink_count; ++i) {
struct sc_packet_sink *sink = source->sinks[i];
if (!sink->ops->open(sink, codec)) {
if (!sink->ops->open(sink, ctx)) {
sc_packet_source_sinks_close_firsts(source, i);
return false;
}

2
app/src/trait/packet_source.h
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@ -26,7 +26,7 @@ sc_packet_source_add_sink(struct sc_packet_source *source,
bool
sc_packet_source_sinks_open(struct sc_packet_source *source,
const AVCodec *codec);
AVCodecContext *ctx);
void
sc_packet_source_sinks_close(struct sc_packet_source *source);

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