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@@ -0,0 +1,251 @@
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+/******************************************************************************
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+ Copyright (C) 2014 by Ruwen Hahn <[email protected]>
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+
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+ This program is free software: you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation, either version 2 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program. If not, see <http://www.gnu.org/licenses/>.
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+******************************************************************************/
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+
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+#include "media-remux.h"
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+
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+#include "../util/base.h"
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+#include "../util/bmem.h"
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+#include "../util/platform.h"
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+
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+#include <libavformat/avformat.h>
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+
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+#include <sys/types.h>
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+#include <sys/stat.h>
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+
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+struct media_remux_job {
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+ int64_t in_size;
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+ AVFormatContext *ifmt_ctx, *ofmt_ctx;
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+};
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+
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+static inline void init_size(media_remux_job_t job, const char *in_filename)
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+{
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+#ifdef _MSC_VER
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+ struct _stat64 st = {0};
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+ _stat64(in_filename, &st);
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+#else
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+ struct stat st = {0};
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+ stat(in_filename, &st);
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+#endif
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+ job->in_size = st.st_size;
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+}
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+
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+static inline bool init_input(media_remux_job_t job, const char *in_filename)
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+{
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+ int ret = avformat_open_input(&job->ifmt_ctx, in_filename, NULL, NULL);
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+ if (ret < 0) {
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+ blog(LOG_ERROR, "media_remux: Could not open input file '%s'",
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+ in_filename);
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+ return false;
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+ }
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+
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+ ret = avformat_find_stream_info(job->ifmt_ctx, NULL);
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+ if (ret < 0) {
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+ blog(LOG_ERROR, "media_remux: Failed to retrieve input stream"
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+ " information");
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+ return false;
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+ }
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+
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+#ifndef _NDEBUG
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+ av_dump_format(job->ifmt_ctx, 0, in_filename, false);
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+#endif
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+ return true;
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+}
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+
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+static inline bool init_output(media_remux_job_t job, const char *out_filename)
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+{
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+ int ret;
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+
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+ avformat_alloc_output_context2(&job->ofmt_ctx, NULL, NULL,
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+ out_filename);
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+ if (!job->ofmt_ctx) {
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+ blog(LOG_ERROR, "media_remux: Could not create output context");
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+ return false;
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+ }
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+
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+ for (unsigned i = 0; i < job->ifmt_ctx->nb_streams; i++) {
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+ AVStream *in_stream = job->ifmt_ctx->streams[i];
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+ AVStream *out_stream = avformat_new_stream(job->ofmt_ctx,
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+ in_stream->codec->codec);
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+ if (!out_stream) {
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+ blog(LOG_ERROR, "media_remux: Failed to allocate output"
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+ " stream");
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+ return false;
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+ }
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+
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+ ret = avcodec_copy_context(out_stream->codec, in_stream->codec);
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+ if (ret < 0) {
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+ blog(LOG_ERROR, "media_remux: Failed to copy context");
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+ return false;
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+ }
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+ out_stream->time_base = out_stream->codec->time_base;
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+
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+ out_stream->codec->codec_tag = 0;
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+ if (job->ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
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+ out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
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+ }
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+
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+#ifndef _NDEBUG
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+ av_dump_format(job->ofmt_ctx, 0, out_filename, true);
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+#endif
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+
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+ if (!(job->ofmt_ctx->oformat->flags & AVFMT_NOFILE)) {
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+ ret = avio_open(&job->ofmt_ctx->pb, out_filename,
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+ AVIO_FLAG_WRITE);
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+ if (ret < 0) {
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+ blog(LOG_ERROR, "media_remux: Failed to open output"
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+ " file '%s'", out_filename);
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+ return false;
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+ }
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+ }
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+
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+ return true;
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+}
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+
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+bool media_remux_job_create(media_remux_job_t *job, const char *in_filename,
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+ const char *out_filename)
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+{
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+ if (!job)
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+ return false;
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+
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+ *job = NULL;
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+ if (!os_file_exists(in_filename))
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+ return false;
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+
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+ *job = (media_remux_job_t)bzalloc(sizeof(struct media_remux_job));
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+ if (!*job)
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+ return false;
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+
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+ init_size(*job, in_filename);
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+
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+ av_register_all();
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+
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+ if (!init_input(*job, in_filename))
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+ goto fail;
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+
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+ if (!init_output(*job, out_filename))
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+ goto fail;
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+
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+ return true;
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+
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+fail:
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+ media_remux_job_destroy(*job);
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+ return false;
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+}
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+
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+static inline void process_packet(AVPacket *pkt,
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+ AVStream *in_stream, AVStream *out_stream)
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+{
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+ pkt->pts = av_rescale_q_rnd(pkt->pts, in_stream->time_base,
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+ out_stream->time_base,
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+ AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
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+ pkt->dts = av_rescale_q_rnd(pkt->dts, in_stream->time_base,
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+ out_stream->time_base,
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+ AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
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+ pkt->duration = (int)av_rescale_q(pkt->duration,
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+ in_stream->time_base, out_stream->time_base);
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+ pkt->pos = -1;
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+
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+}
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+
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+static inline int process_packets(media_remux_job_t job,
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+ media_remux_progress_callback callback, void *data)
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+{
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+ AVPacket pkt;
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+
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+ int ret, throttle = 0;
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+ for (;;) {
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+ ret = av_read_frame(job->ifmt_ctx, &pkt);
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+ if (ret < 0) {
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+ if (ret != AVERROR_EOF)
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+ blog(LOG_ERROR, "media_remux: Error reading"
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+ " packet: %s",
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+ av_err2str(ret));
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+ break;
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+ }
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+
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+ if (callback != NULL && throttle++ > 10) {
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+ float progress = pkt.pos / (float)job->in_size * 100.f;
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+ if (!callback(data, progress))
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+ break;
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+ throttle = 0;
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+ }
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+
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+ process_packet(&pkt, job->ifmt_ctx->streams[pkt.stream_index],
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+ job->ofmt_ctx->streams[pkt.stream_index]);
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+
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+ ret = av_interleaved_write_frame(job->ofmt_ctx, &pkt);
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+ av_free_packet(&pkt);
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+
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+ if (ret < 0) {
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+ blog(LOG_ERROR, "media_remux: Error muxing packet: %s",
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+ av_err2str(ret));
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+ break;
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+ }
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+ }
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+
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+ return ret;
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+}
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+
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+bool media_remux_job_process(media_remux_job_t job,
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+ media_remux_progress_callback callback, void *data)
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+{
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+ int ret;
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+ bool success = false;
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+
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+ if (!job)
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+ return success;
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+
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+ ret = avformat_write_header(job->ofmt_ctx, NULL);
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+ if (ret < 0) {
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+ blog(LOG_ERROR, "media_remux: Error opening output file: %s",
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+ av_err2str(ret));
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+ return success;
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+ }
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+
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+ if (callback != NULL)
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+ callback(data, 0.f);
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+
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+ ret = process_packets(job, callback, data);
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+ success = ret >= 0 || ret == AVERROR_EOF;
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+
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+ ret = av_write_trailer(job->ofmt_ctx);
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+ if (ret < 0) {
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+ blog(LOG_ERROR, "media_remux: av_write_trailer: %s",
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+ av_err2str(ret));
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+ success = false;
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+ }
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+
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+ if (callback != NULL)
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+ callback(data, 100.f);
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+
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+ return success;
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+}
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+
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+void media_remux_job_destroy(media_remux_job_t job)
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+{
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+ if (!job)
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+ return;
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+
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+ avformat_close_input(&job->ifmt_ctx);
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+
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+ if (job->ofmt_ctx && !(job->ofmt_ctx->oformat->flags & AVFMT_NOFILE))
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+ avio_close(job->ofmt_ctx->pb);
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+
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+ avformat_free_context(job->ofmt_ctx);
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+
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+ bfree(job);
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+}
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Palana