1 files changed, 246 insertions, 23 deletions

diff --git a/chromium/third_party/ffmpeg/libavformat/concatdec.c b/chromium/third_party/ffmpeg/libavformat/concatdec.c
index 428c749ab24..4590dc59232 100644
--- a/chromium/third_party/ffmpeg/libavformat/concatdec.c
+++ b/chromium/third_party/ffmpeg/libavformat/concatdec.c
@@ -18,17 +18,31 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/avassert.h"
 #include "libavutil/avstring.h"
+#include "libavutil/intreadwrite.h"
 #include "libavutil/opt.h"
 #include "libavutil/parseutils.h"
 #include "avformat.h"
 #include "internal.h"
 #include "url.h"
 
+typedef enum ConcatMatchMode {
+    MATCH_ONE_TO_ONE,
+    MATCH_EXACT_ID,
+} ConcatMatchMode;
+
+typedef struct ConcatStream {
+    AVBitStreamFilterContext *bsf;
+    int out_stream_index;
+} ConcatStream;
+
 typedef struct {
     char *url;
     int64_t start_time;
     int64_t duration;
+    ConcatStream *streams;
+    int nb_streams;
 } ConcatFile;
 
 typedef struct {
@@ -39,6 +53,8 @@ typedef struct {
     AVFormatContext *avf;
     int safe;
     int seekable;
+    ConcatMatchMode stream_match_mode;
+    unsigned auto_convert;
 } ConcatContext;
 
 static int concat_probe(AVProbeData *probe)
@@ -85,18 +101,28 @@ static int add_file(AVFormatContext *avf, char *filename, ConcatFile **rfile,
     ConcatContext *cat = avf->priv_data;
     ConcatFile *file;
     char *url = NULL;
-    size_t url_len;
+    const char *proto;
+    size_t url_len, proto_len;
     int ret;
 
     if (cat->safe > 0 && !safe_filename(filename)) {
         av_log(avf, AV_LOG_ERROR, "Unsafe file name '%s'\n", filename);
         FAIL(AVERROR(EPERM));
     }
-    url_len = strlen(avf->filename) + strlen(filename) + 16;
-    if (!(url = av_malloc(url_len)))
-        FAIL(AVERROR(ENOMEM));
-    ff_make_absolute_url(url, url_len, avf->filename, filename);
-    av_freep(&filename);
+
+    proto = avio_find_protocol_name(filename);
+    proto_len = proto ? strlen(proto) : 0;
+    if (!memcmp(filename, proto, proto_len) &&
+        (filename[proto_len] == ':' || filename[proto_len] == ',')) {
+        url = filename;
+        filename = NULL;
+    } else {
+        url_len = strlen(avf->filename) + strlen(filename) + 16;
+        if (!(url = av_malloc(url_len)))
+            FAIL(AVERROR(ENOMEM));
+        ff_make_absolute_url(url, url_len, avf->filename, filename);
+        av_freep(&filename);
+    }
 
     if (cat->nb_files >= *nb_files_alloc) {
         size_t n = FFMAX(*nb_files_alloc * 2, 16);
@@ -124,6 +150,130 @@ fail:
     return ret;
 }
 
+static int copy_stream_props(AVStream *st, AVStream *source_st)
+{
+    int ret;
+
+    if (st->codec->codec_id || !source_st->codec->codec_id) {
+        if (st->codec->extradata_size < source_st->codec->extradata_size) {
+            ret = ff_alloc_extradata(st->codec,
+                                     source_st->codec->extradata_size);
+            if (ret < 0)
+                return ret;
+        }
+        memcpy(st->codec->extradata, source_st->codec->extradata,
+               source_st->codec->extradata_size);
+        return 0;
+    }
+    if ((ret = avcodec_copy_context(st->codec, source_st->codec)) < 0)
+        return ret;
+    st->r_frame_rate        = source_st->r_frame_rate;
+    st->avg_frame_rate      = source_st->avg_frame_rate;
+    st->time_base           = source_st->time_base;
+    st->sample_aspect_ratio = source_st->sample_aspect_ratio;
+    return 0;
+}
+
+static int detect_stream_specific(AVFormatContext *avf, int idx)
+{
+    ConcatContext *cat = avf->priv_data;
+    AVStream *st = cat->avf->streams[idx];
+    ConcatStream *cs = &cat->cur_file->streams[idx];
+    AVBitStreamFilterContext *bsf;
+
+    if (cat->auto_convert && st->codec->codec_id == AV_CODEC_ID_H264 &&
+        (st->codec->extradata_size < 4 || AV_RB32(st->codec->extradata) != 1)) {
+        av_log(cat->avf, AV_LOG_INFO,
+               "Auto-inserting h264_mp4toannexb bitstream filter\n");
+        if (!(bsf = av_bitstream_filter_init("h264_mp4toannexb"))) {
+            av_log(avf, AV_LOG_ERROR, "h264_mp4toannexb bitstream filter "
+                   "required for H.264 streams\n");
+            return AVERROR_BSF_NOT_FOUND;
+        }
+        cs->bsf = bsf;
+    }
+    return 0;
+}
+
+static int match_streams_one_to_one(AVFormatContext *avf)
+{
+    ConcatContext *cat = avf->priv_data;
+    AVStream *st;
+    int i, ret;
+
+    for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++) {
+        if (i < avf->nb_streams) {
+            st = avf->streams[i];
+        } else {
+            if (!(st = avformat_new_stream(avf, NULL)))
+                return AVERROR(ENOMEM);
+        }
+        if ((ret = copy_stream_props(st, cat->avf->streams[i])) < 0)
+            return ret;
+        cat->cur_file->streams[i].out_stream_index = i;
+    }
+    return 0;
+}
+
+static int match_streams_exact_id(AVFormatContext *avf)
+{
+    ConcatContext *cat = avf->priv_data;
+    AVStream *st;
+    int i, j, ret;
+
+    for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++) {
+        st = cat->avf->streams[i];
+        for (j = 0; j < avf->nb_streams; j++) {
+            if (avf->streams[j]->id == st->id) {
+                av_log(avf, AV_LOG_VERBOSE,
+                       "Match slave stream #%d with stream #%d id 0x%x\n",
+                       i, j, st->id);
+                if ((ret = copy_stream_props(avf->streams[j], st)) < 0)
+                    return ret;
+                cat->cur_file->streams[i].out_stream_index = j;
+            }
+        }
+    }
+    return 0;
+}
+
+static int match_streams(AVFormatContext *avf)
+{
+    ConcatContext *cat = avf->priv_data;
+    ConcatStream *map;
+    int i, ret;
+
+    if (cat->cur_file->nb_streams >= cat->avf->nb_streams)
+        return 0;
+    map = av_realloc(cat->cur_file->streams,
+                     cat->avf->nb_streams * sizeof(*map));
+    if (!map)
+        return AVERROR(ENOMEM);
+    cat->cur_file->streams = map;
+    memset(map + cat->cur_file->nb_streams, 0,
+           (cat->avf->nb_streams - cat->cur_file->nb_streams) * sizeof(*map));
+
+    for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++)
+        map[i].out_stream_index = -1;
+    switch (cat->stream_match_mode) {
+    case MATCH_ONE_TO_ONE:
+        ret = match_streams_one_to_one(avf);
+        break;
+    case MATCH_EXACT_ID:
+        ret = match_streams_exact_id(avf);
+        break;
+    default:
+        ret = AVERROR_BUG;
+    }
+    if (ret < 0)
+        return ret;
+    for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++)
+        if ((ret = detect_stream_specific(avf, i)) < 0)
+            return ret;
+    cat->cur_file->nb_streams = cat->avf->nb_streams;
+    return 0;
+}
+
 static int open_file(AVFormatContext *avf, unsigned fileno)
 {
     ConcatContext *cat = avf->priv_data;
@@ -132,9 +282,16 @@ static int open_file(AVFormatContext *avf, unsigned fileno)
 
     if (cat->avf)
         avformat_close_input(&cat->avf);
+
+    cat->avf = avformat_alloc_context();
+    if (!cat->avf)
+        return AVERROR(ENOMEM);
+
+    cat->avf->interrupt_callback = avf->interrupt_callback;
     if ((ret = avformat_open_input(&cat->avf, file->url, NULL, NULL)) < 0 ||
         (ret = avformat_find_stream_info(cat->avf, NULL)) < 0) {
         av_log(avf, AV_LOG_ERROR, "Impossible to open '%s'\n", file->url);
+        avformat_close_input(&cat->avf);
         return ret;
     }
     cat->cur_file = file;
@@ -142,6 +299,8 @@ static int open_file(AVFormatContext *avf, unsigned fileno)
         file->start_time = !fileno ? 0 :
                            cat->files[fileno - 1].start_time +
                            cat->files[fileno - 1].duration;
+    if ((ret = match_streams(avf)) < 0)
+        return ret;
     return 0;
 }
 
@@ -152,8 +311,10 @@ static int concat_read_close(AVFormatContext *avf)
 
     if (cat->avf)
         avformat_close_input(&cat->avf);
-    for (i = 0; i < cat->nb_files; i++)
+    for (i = 0; i < cat->nb_files; i++) {
         av_freep(&cat->files[i].url);
+        av_freep(&cat->files[i].streams);
+    }
     av_freep(&cat->files);
     return 0;
 }
@@ -166,7 +327,6 @@ static int concat_read_header(AVFormatContext *avf)
     int ret, line = 0, i;
     unsigned nb_files_alloc = 0;
     ConcatFile *file = NULL;
-    AVStream *st, *source_st;
     int64_t time = 0;
 
     while (1) {
@@ -200,6 +360,17 @@ static int concat_read_header(AVFormatContext *avf)
                 FAIL(ret);
             }
             file->duration = dur;
+        } else if (!strcmp(keyword, "stream")) {
+            if (!avformat_new_stream(avf, NULL))
+                FAIL(AVERROR(ENOMEM));
+        } else if (!strcmp(keyword, "exact_stream_id")) {
+            if (!avf->nb_streams) {
+                av_log(avf, AV_LOG_ERROR, "Line %d: exact_stream_id without stream\n",
+                       line);
+                FAIL(AVERROR_INVALIDDATA);
+            }
+            avf->streams[avf->nb_streams - 1]->id =
+                strtol(get_keyword(&cursor), NULL, 0);
         } else if (!strcmp(keyword, "ffconcat")) {
             char *ver_kw  = get_keyword(&cursor);
             char *ver_val = get_keyword(&cursor);
@@ -234,20 +405,10 @@ static int concat_read_header(AVFormatContext *avf)
         cat->seekable = 1;
     }
 
+    cat->stream_match_mode = avf->nb_streams ? MATCH_EXACT_ID :
+                                               MATCH_ONE_TO_ONE;
     if ((ret = open_file(avf, 0)) < 0)
         FAIL(ret);
-    for (i = 0; i < cat->avf->nb_streams; i++) {
-        if (!(st = avformat_new_stream(avf, NULL)))
-            FAIL(AVERROR(ENOMEM));
-        source_st = cat->avf->streams[i];
-        if ((ret = avcodec_copy_context(st->codec, source_st->codec)) < 0)
-            FAIL(ret);
-        st->r_frame_rate        = source_st->r_frame_rate;
-        st->avg_frame_rate      = source_st->avg_frame_rate;
-        st->time_base           = source_st->time_base;
-        st->sample_aspect_ratio = source_st->sample_aspect_ratio;
-    }
-
     return 0;
 
 fail:
@@ -268,17 +429,77 @@ static int open_next_file(AVFormatContext *avf)
     return open_file(avf, fileno);
 }
 
+static int filter_packet(AVFormatContext *avf, ConcatStream *cs, AVPacket *pkt)
+{
+    AVStream *st = avf->streams[cs->out_stream_index];
+    AVBitStreamFilterContext *bsf;
+    AVPacket pkt2;
+    int ret;
+
+    av_assert0(cs->out_stream_index >= 0);
+    for (bsf = cs->bsf; bsf; bsf = bsf->next) {
+        pkt2 = *pkt;
+        ret = av_bitstream_filter_filter(bsf, st->codec, NULL,
+                                         &pkt2.data, &pkt2.size,
+                                         pkt->data, pkt->size,
+                                         !!(pkt->flags & AV_PKT_FLAG_KEY));
+        if (ret < 0) {
+            av_packet_unref(pkt);
+            return ret;
+        }
+        av_assert0(pkt2.buf);
+        if (ret == 0 && pkt2.data != pkt->data) {
+            if ((ret = av_copy_packet(&pkt2, pkt)) < 0) {
+                av_free(pkt2.data);
+                return ret;
+            }
+            ret = 1;
+        }
+        if (ret > 0) {
+            av_free_packet(pkt);
+            pkt2.buf = av_buffer_create(pkt2.data, pkt2.size,
+                                        av_buffer_default_free, NULL, 0);
+            if (!pkt2.buf) {
+                av_free(pkt2.data);
+                return AVERROR(ENOMEM);
+            }
+        }
+        *pkt = pkt2;
+    }
+    return 0;
+}
+
 static int concat_read_packet(AVFormatContext *avf, AVPacket *pkt)
 {
     ConcatContext *cat = avf->priv_data;
     int ret;
     int64_t delta;
+    ConcatStream *cs;
 
     while (1) {
-        if ((ret = av_read_frame(cat->avf, pkt)) != AVERROR_EOF ||
-            (ret = open_next_file(avf)) < 0)
-            break;
+        ret = av_read_frame(cat->avf, pkt);
+        if (ret == AVERROR_EOF) {
+            if ((ret = open_next_file(avf)) < 0)
+                return ret;
+            continue;
+        }
+        if (ret < 0)
+            return ret;
+        if ((ret = match_streams(avf)) < 0) {
+            av_packet_unref(pkt);
+            return ret;
+        }
+        cs = &cat->cur_file->streams[pkt->stream_index];
+        if (cs->out_stream_index < 0) {
+            av_packet_unref(pkt);
+            continue;
+        }
+        pkt->stream_index = cs->out_stream_index;
+        break;
     }
+    if ((ret = filter_packet(avf, cs, pkt)))
+        return ret;
+
     delta = av_rescale_q(cat->cur_file->start_time - cat->avf->start_time,
                          AV_TIME_BASE_Q,
                          cat->avf->streams[pkt->stream_index]->time_base);
@@ -384,6 +605,8 @@ static int concat_seek(AVFormatContext *avf, int stream,
 static const AVOption options[] = {
     { "safe", "enable safe mode",
       OFFSET(safe), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, DEC },
+    { "auto_convert", "automatically convert bitstream format",
+      OFFSET(auto_convert), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC },
     { NULL }
 };