Telegram-Android/TMessagesProj/jni/video_audio_in.c

244 lines
6.1 KiB
C
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2013-12-20 20:25:49 +01:00
#include "video.h"
#include <stdio.h>
#include <libavutil/timestamp.h>
#include <libavutil/imgutils.h>
#include "log.h"
AVPacket pkt;
int video_stream_idx = -1, audio_stream_idx = -1;
AVCodecContext *video_dec_ctx = NULL, *audio_dec_ctx = NULL;
AVFrame *frame = NULL;
AVStream *video_stream = NULL, *audio_stream = NULL;
AVFormatContext *fmt_ctx = NULL;
int64_t total_duration;
int64_t current_duration;
char *src = NULL;
char *dest = NULL;
int lastLog = 10;
void cleanup_in() {
if (video_dec_ctx) {
avcodec_close(video_dec_ctx);
video_dec_ctx = NULL;
}
if (audio_dec_ctx) {
avcodec_close(audio_dec_ctx);
audio_dec_ctx = NULL;
}
if (fmt_ctx) {
avformat_close_input(&fmt_ctx);
fmt_ctx = NULL;
}
if (frame) {
av_frame_free(&frame);
frame = NULL;
}
if (src) {
free(src);
src = NULL;
}
if (dest) {
free(dest);
dest = NULL;
}
total_duration = 0;
current_duration = 0;
video_stream_idx = -1;
audio_stream_idx = -1;
video_stream = NULL;
audio_stream = NULL;
lastLog = 10;
}
void onError() {
cleanup_in();
cleanup_out();
}
void onDone() {
LOGD("OK\n");
cleanup_in();
cleanup_out();
}
void onProgress() {
float progress = (float)current_duration / (float)total_duration * 100;
if (progress > lastLog) {
lastLog += 10;
LOGD("progress %.2f\n", progress);
}
}
int open_codec_context(int *stream_idx, AVFormatContext *fmt_ctx, enum AVMediaType type) {
int ret;
AVStream *st;
AVCodecContext *dec_ctx = NULL;
AVCodec *dec = NULL;
AVDictionary *opts = NULL;
ret = av_find_best_stream(fmt_ctx, type, -1, -1, NULL, 0);
if (ret < 0) {
LOGD("Could not find %s stream in input file\n", av_get_media_type_string(type));
return ret;
} else {
*stream_idx = ret;
st = fmt_ctx->streams[*stream_idx];
dec_ctx = st->codec;
dec = avcodec_find_decoder(dec_ctx->codec_id);
if (!dec) {
LOGD("Failed to find %s codec\n", av_get_media_type_string(type));
return ret;
}
av_dict_set(&opts, "refcounted_frames", "1", 0);
if ((ret = avcodec_open2(dec_ctx, dec, &opts)) < 0) {
LOGD("Failed to open %s codec\n", av_get_media_type_string(type));
return ret;
}
}
return 0;
}
int decode_packet(int *got_frame, int cached) {
int ret = 0;
int decoded = pkt.size;
*got_frame = 0;
if (pkt.stream_index == video_stream_idx) {
ret = avcodec_decode_video2(video_dec_ctx, frame, got_frame, &pkt);
if (ret < 0) {
LOGD("Error decoding video frame\n");
return ret;
}
if (*got_frame) {
ret = write_video_frame(frame);
if (ret < 0) {
return ret;
}
}
} else if (pkt.stream_index == audio_stream_idx) {
ret = avcodec_decode_audio4(audio_dec_ctx, frame, got_frame, &pkt);
if (ret < 0) {
LOGD("Error decoding audio frame\n");
return ret;
}
decoded = FFMIN(ret, pkt.size);
if (*got_frame) {
ret = write_audio_frame(frame, audio_dec_ctx);
if (ret < 0) {
return -1;
}
}
frame->pts = AV_NOPTS_VALUE;
}
if (*got_frame) {
av_frame_unref(frame);
}
return decoded;
}
void convertFile(const char *src_filename, const char *dst_filename, int bitr) {
int ret = 0;
int got_frame;
src = malloc(strlen(src_filename) + 1);
memcpy(src, src_filename, strlen(src_filename));
src[strlen(src_filename)] = '\0';
dest = malloc(strlen(dst_filename) + 1);
memcpy(dest, dst_filename, strlen(dst_filename));
dest[strlen(dst_filename)] = '\0';
if ((ret = avformat_open_input(&fmt_ctx, src, NULL, NULL)) < 0) {
LOGD("Could not open source file %s, %s\n", src, av_err2str(ret));
onError();
return;
}
if (avformat_find_stream_info(fmt_ctx, NULL) < 0) {
LOGD("Could not find stream information\n");
onError();
return;
}
if (open_codec_context(&video_stream_idx, fmt_ctx, AVMEDIA_TYPE_VIDEO) >= 0) {
video_stream = fmt_ctx->streams[video_stream_idx];
video_dec_ctx = video_stream->codec;
}
if (open_codec_context(&audio_stream_idx, fmt_ctx, AVMEDIA_TYPE_AUDIO) >= 0) {
audio_stream = fmt_ctx->streams[audio_stream_idx];
audio_dec_ctx = audio_stream->codec;
}
av_dump_format(fmt_ctx, 0, src, 0);
if (!audio_stream && !video_stream) {
LOGD("Could not find audio or video stream in the input, aborting\n");
onError();
return;
}
frame = av_frame_alloc();
if (!frame) {
LOGD("Could not allocate frame\n");
onError();
return;
}
av_init_packet(&pkt);
pkt.data = NULL;
pkt.size = 0;
if (video_stream) {
LOGD("Demuxing video from file '%s'\n", src);
}
if (audio_stream) {
LOGD("Demuxing audio from file '%s'\n", src);
}
ret = prepare_for_video_conversion(dest, video_dec_ctx, audio_dec_ctx, fmt_ctx, video_stream, audio_stream, bitr);
if (ret < 0) {
return;
}
if (video_stream) {
total_duration = video_stream->duration;
}
if (audio_stream) {
total_duration += audio_stream->duration;
}
while (av_read_frame(fmt_ctx, &pkt) >= 0) {
AVPacket orig_pkt = pkt;
do {
ret = decode_packet(&got_frame, 0);
if (ret < 0) {
onError();
return;
}
pkt.data += ret;
pkt.size -= ret;
current_duration += pkt.duration;
onProgress();
} while (pkt.size > 0);
av_free_packet(&orig_pkt);
}
pkt.data = NULL;
pkt.size = 0;
do {
decode_packet(&got_frame, 1);
} while (got_frame);
post_video_conversion();
onDone();
}