Add recorder

Implement recording in a separate "class".
This commit is contained in:
Romain Vimont 2018-11-09 12:21:17 +01:00
parent d706c5df39
commit 27686e9361
6 changed files with 168 additions and 55 deletions

View file

@ -12,6 +12,7 @@ src = [
'src/input_manager.c',
'src/lock_util.c',
'src/net.c',
'src/recorder.c',
'src/scrcpy.c',
'src/screen.c',
'src/server.c',

View file

@ -12,11 +12,10 @@
#include "frames.h"
#include "lock_util.h"
#include "log.h"
#include "recorder.h"
#define BUFSIZE 0x10000
static AVRational us = {1, 1000000};
static inline uint64_t from_be(uint8_t *b, int size)
{
uint64_t x = 0;
@ -40,6 +39,7 @@ static int read_packet(void *opaque, uint8_t *buf, int buf_size) {
remaining = decoder->remaining;
if (remaining == 0) {
// FIXME what if only part of the header is available?
ret = net_recv(decoder->video_socket, header, HEADER_SIZE);
if (ret <= 0)
return ret;
@ -82,7 +82,6 @@ static void notify_stopped(void) {
static int run_decoder(void *data) {
struct decoder *decoder = data;
int ret;
AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_H264);
if (!codec) {
@ -129,37 +128,10 @@ static int run_decoder(void *data) {
goto run_finally_free_avio_ctx;
}
AVStream *outstream = NULL;
AVFormatContext *output_ctx = NULL;
if (decoder->out_filename) {
avformat_alloc_output_context2(&output_ctx, NULL, NULL, decoder->out_filename);
if (!output_ctx) {
LOGE("Could not allocate output format context");
goto run_finally_free_avio_ctx;
} else {
outstream = avformat_new_stream(output_ctx, codec);
if (!outstream) {
LOGE("Could not allocate output stream");
goto run_finally_free_output_ctx;
}
outstream->codec = avcodec_alloc_context3(codec);
outstream->codec->pix_fmt = AV_PIX_FMT_YUV420P;
outstream->codec->width = decoder->frame_size.width;
outstream->codec->height = decoder->frame_size.height;
outstream->time_base = (AVRational) {1, 60};
outstream->codec->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
ret = avio_open(&output_ctx->pb, decoder->out_filename, AVIO_FLAG_WRITE);
if (ret < 0) {
LOGE("Failed to open output file");
goto run_finally_free_output_ctx;
}
ret = avformat_write_header(output_ctx, NULL);
if (ret < 0) {
LOGE("Error writing output header");
avio_closep(&output_ctx->pb);
goto run_finally_free_output_ctx;
}
}
if (decoder->recorder &&
!recorder_open(decoder->recorder, codec)) {
LOGE("Could not open recorder");
goto run_finally_close_input;
}
AVPacket packet;
@ -168,16 +140,21 @@ static int run_decoder(void *data) {
packet.size = 0;
while (!av_read_frame(format_ctx, &packet)) {
if (output_ctx) {
if (decoder->recorder) {
packet.pts = decoder->pts;
av_packet_rescale_ts(&packet, us, outstream->time_base);
ret = av_write_frame(output_ctx, &packet);
// no need to rescale with av_packet_rescale_ts(), the timestamps
// are in microseconds both in input and output
if (!recorder_write(decoder->recorder, &packet)) {
LOGE("Could not write frame to output file");
av_packet_unref(&packet);
goto run_quit;
}
}
// the new decoding/encoding API has been introduced by:
// <http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=7fc329e2dd6226dfecaa4a1d7adf353bf2773726>
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57, 37, 0)
int ret;
if ((ret = avcodec_send_packet(codec_ctx, &packet)) < 0) {
LOGE("Could not send video packet: %d", ret);
goto run_quit;
@ -218,14 +195,11 @@ static int run_decoder(void *data) {
LOGD("End of frames");
run_quit:
if (output_ctx) {
ret = av_write_trailer(output_ctx);
avio_closep(&output_ctx->pb);
if (decoder->recorder) {
recorder_close(decoder->recorder);
}
run_finally_close_input:
avformat_close_input(&format_ctx);
run_finally_free_output_ctx:
if (output_ctx)
avformat_free_context(output_ctx);
run_finally_free_avio_ctx:
av_freep(&avio_ctx);
run_finally_free_format_ctx:
@ -239,16 +213,16 @@ run_end:
return 0;
}
void decoder_init(struct decoder *decoder, struct frames *frames, socket_t video_socket, struct size frame_size) {
void decoder_init(struct decoder *decoder, struct frames *frames,
socket_t video_socket, struct recorder *recorder) {
decoder->frames = frames;
decoder->video_socket = video_socket;
decoder->frame_size = frame_size;
decoder->recorder = recorder;
}
SDL_bool decoder_start(struct decoder *decoder, const char *out_filename) {
SDL_bool decoder_start(struct decoder *decoder) {
LOGD("Starting decoder thread");
decoder->out_filename = out_filename;
decoder->thread = SDL_CreateThread(run_decoder, "video_decoder", decoder);
if (!decoder->thread) {
LOGC("Could not start decoder thread");

View file

@ -15,13 +15,13 @@ struct decoder {
socket_t video_socket;
SDL_Thread *thread;
SDL_mutex *mutex;
const char *out_filename;
struct size frame_size;
struct recorder *recorder;
int remaining;
};
void decoder_init(struct decoder *decoder, struct frames *frames, socket_t video_socket, struct size frame_size);
SDL_bool decoder_start(struct decoder *decoder, const char *out_filename);
void decoder_init(struct decoder *decoder, struct frames *frames,
socket_t video_socket, struct recorder *recoder);
SDL_bool decoder_start(struct decoder *decoder);
void decoder_stop(struct decoder *decoder);
void decoder_join(struct decoder *decoder);

98
app/src/recorder.c Normal file
View file

@ -0,0 +1,98 @@
#include "recorder.h"
#include <libavutil/time.h>
#include "config.h"
#include "log.h"
static const AVOutputFormat *find_mp4_muxer(void) {
void *opaque = NULL;
const AVOutputFormat *oformat;
do {
oformat = av_muxer_iterate(&opaque);
// until null or with name "mp4"
} while (oformat && strcmp(oformat->name, "mp4"));
return oformat;
}
SDL_bool recorder_init(struct recorder *recorder, const char *filename,
struct size declared_frame_size) {
recorder->filename = SDL_strdup(filename);
if (!recorder->filename) {
LOGE("Cannot strdup filename");
return SDL_FALSE;
}
recorder->declared_frame_size = declared_frame_size;
return SDL_TRUE;
}
void recorder_destroy(struct recorder *recorder) {
SDL_free(recorder->filename);
}
SDL_bool recorder_open(struct recorder *recorder, AVCodec *input_codec) {
const AVOutputFormat *mp4 = find_mp4_muxer();
if (!mp4) {
LOGE("Could not find mp4 muxer");
return SDL_FALSE;
}
recorder->ctx = avformat_alloc_context();
if (!recorder->ctx) {
LOGE("Could not allocate output context");
return SDL_FALSE;
}
// contrary to the deprecated API (av_oformat_next()), av_muxer_iterate()
// returns (on purpose) a pointer-to-const, but AVFormatContext.oformat
// still expects a pointer-to-non-const (it has not be updated accordingly)
// <https://github.com/FFmpeg/FFmpeg/commit/0694d8702421e7aff1340038559c438b61bb30dd>
recorder->ctx->oformat = (AVOutputFormat *) mp4;
AVStream *ostream = avformat_new_stream(recorder->ctx, input_codec);
if (!ostream) {
avformat_free_context(recorder->ctx);
return SDL_FALSE;
}
ostream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
ostream->codecpar->codec_id = input_codec->id;
ostream->codecpar->format = AV_PIX_FMT_YUV420P;
ostream->codecpar->width = recorder->declared_frame_size.width;
ostream->codecpar->height = recorder->declared_frame_size.height;
ostream->time_base = (AVRational) {1, 1000000}; // timestamps in us
int ret = avio_open(&recorder->ctx->pb, recorder->filename,
AVIO_FLAG_WRITE);
if (ret < 0) {
LOGE("Failed to open output file: %s", recorder->filename);
// ostream will be cleaned up during context cleaning
avformat_free_context(recorder->ctx);
return SDL_FALSE;
}
ret = avformat_write_header(recorder->ctx, NULL);
if (ret < 0) {
LOGE("Failed to write header to %s", recorder->filename);
avio_closep(&recorder->ctx->pb);
avformat_free_context(recorder->ctx);
return SDL_FALSE;
}
return SDL_TRUE;
}
void recorder_close(struct recorder *recorder) {
int ret = av_write_trailer(recorder->ctx);
if (ret < 0) {
LOGE("Failed to write trailer to %s", recorder->filename);
}
avio_close(recorder->ctx->pb);
avformat_free_context(recorder->ctx);
}
SDL_bool recorder_write(struct recorder *recorder, AVPacket *packet) {
return av_write_frame(recorder->ctx, packet) >= 0;
}

24
app/src/recorder.h Normal file
View file

@ -0,0 +1,24 @@
#ifndef RECORDER_H
#define RECORDER_H
#include <libavformat/avformat.h>
#include <SDL2/SDL_stdinc.h>
#include "common.h"
struct recorder {
char *filename;
AVFormatContext *ctx;
struct size declared_frame_size;
};
SDL_bool recorder_init(struct recorder *recoder, const char *filename,
struct size declared_frame_size);
void recorder_destroy(struct recorder *recorder);
SDL_bool recorder_open(struct recorder *recorder, AVCodec *input_codec);
void recorder_close(struct recorder *recorder);
SDL_bool recorder_write(struct recorder *recorder, AVPacket *packet);
#endif

View file

@ -20,6 +20,7 @@
#include "log.h"
#include "lock_util.h"
#include "net.h"
#include "recorder.h"
#include "screen.h"
#include "server.h"
#include "tiny_xpm.h"
@ -30,6 +31,7 @@ static struct frames frames;
static struct decoder decoder;
static struct controller controller;
static struct file_handler file_handler;
static struct recorder recorder;
static struct input_manager input_manager = {
.controller = &controller,
@ -193,15 +195,25 @@ SDL_bool scrcpy(const struct scrcpy_options *options) {
goto finally_destroy_frames;
}
decoder_init(&decoder, &frames, device_socket, frame_size);
// now we consumed the header values, the socket receives the video stream
// start the decoder
if (!decoder_start(&decoder, options->out_filename)) {
struct recorder *rec = NULL;
if (options->out_filename) {
if (!recorder_init(&recorder, options->out_filename, frame_size)) {
ret = SDL_FALSE;
server_stop(&server);
goto finally_destroy_file_handler;
}
rec = &recorder;
}
decoder_init(&decoder, &frames, device_socket, rec);
// now we consumed the header values, the socket receives the video stream
// start the decoder
if (!decoder_start(&decoder)) {
ret = SDL_FALSE;
server_stop(&server);
goto finally_destroy_recorder;
}
if (!controller_init(&controller, device_socket)) {
ret = SDL_FALSE;
@ -246,6 +258,10 @@ finally_destroy_file_handler:
file_handler_stop(&file_handler);
file_handler_join(&file_handler);
file_handler_destroy(&file_handler);
finally_destroy_recorder:
if (options->out_filename) {
recorder_destroy(&recorder);
}
finally_destroy_frames:
frames_destroy(&frames);
finally_destroy_server: