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