diff options
Diffstat (limited to 'libavformat/mov.c')
-rw-r--r-- | libavformat/mov.c | 169 |
1 files changed, 125 insertions, 44 deletions
diff --git a/libavformat/mov.c b/libavformat/mov.c index 9ae4f8c09c..da613bee73 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -2947,6 +2947,52 @@ static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, uns return *ctts_count; } +static void mov_current_sample_inc(MOVStreamContext *sc) +{ + sc->current_sample++; + sc->current_index++; + if (sc->index_ranges && + sc->current_index >= sc->current_index_range->end && + sc->current_index_range->end) { + sc->current_index_range++; + sc->current_index = sc->current_index_range->start; + } +} + +static void mov_current_sample_dec(MOVStreamContext *sc) +{ + sc->current_sample--; + sc->current_index--; + if (sc->index_ranges && + sc->current_index < sc->current_index_range->start && + sc->current_index_range > sc->index_ranges) { + sc->current_index_range--; + sc->current_index = sc->current_index_range->end - 1; + } +} + +static void mov_current_sample_set(MOVStreamContext *sc, int current_sample) +{ + int64_t range_size; + + sc->current_sample = current_sample; + sc->current_index = current_sample; + if (!sc->index_ranges) { + return; + } + + for (sc->current_index_range = sc->index_ranges; + sc->current_index_range->end; + sc->current_index_range++) { + range_size = sc->current_index_range->end - sc->current_index_range->start; + if (range_size > current_sample) { + sc->current_index = sc->current_index_range->start + current_sample; + break; + } + current_sample -= range_size; + } +} + /** * Fix st->index_entries, so that it contains only the entries (and the entries * which are needed to decode them) that fall in the edit list time ranges. @@ -2984,10 +3030,21 @@ static void mov_fix_index(MOVContext *mov, AVStream *st) int num_discarded_begin = 0; int first_non_zero_audio_edit = -1; int packet_skip_samples = 0; + MOVIndexRange *current_index_range; if (!msc->elst_data || msc->elst_count <= 0 || nb_old <= 0) { return; } + + // allocate the index ranges array + msc->index_ranges = av_malloc((msc->elst_count + 1) * sizeof(msc->index_ranges[0])); + if (!msc->index_ranges) { + av_log(mov->fc, AV_LOG_ERROR, "Cannot allocate index ranges buffer\n"); + return; + } + msc->current_index_range = msc->index_ranges; + current_index_range = msc->index_ranges - 1; + // Clean AVStream from traces of old index st->index_entries = NULL; st->index_entries_allocated_size = 0; @@ -3182,6 +3239,13 @@ static void mov_fix_index(MOVContext *mov, AVStream *st) break; } + // Update the index ranges array + if (current_index_range < msc->index_ranges || index != current_index_range->end) { + current_index_range++; + current_index_range->start = index; + } + current_index_range->end = index + 1; + // Only start incrementing DTS in frame_duration amounts, when we encounter a frame in edit list. if (edit_list_start_encountered > 0) { edit_list_dts_counter = edit_list_dts_counter + frame_duration; @@ -3212,6 +3276,12 @@ static void mov_fix_index(MOVContext *mov, AVStream *st) // Free the old index and the old CTTS structures av_free(e_old); av_free(ctts_data_old); + + // Null terminate the index ranges array + current_index_range++; + current_index_range->start = 0; + current_index_range->end = 0; + msc->current_index = msc->index_ranges[0].start; } static void mov_build_index(MOVContext *mov, AVStream *st) @@ -4908,8 +4978,8 @@ static int mov_read_senc(MOVContext *c, AVIOContext *pb, MOVAtom atom) } sc->cenc.auxiliary_info_end = sc->cenc.auxiliary_info + auxiliary_info_size; - sc->cenc.auxiliary_info_pos = sc->cenc.auxiliary_info; + sc->cenc.auxiliary_info_index = 0; if (avio_read(pb, sc->cenc.auxiliary_info, auxiliary_info_size) != auxiliary_info_size) { av_log(c->fc, AV_LOG_ERROR, "failed to read the auxiliary info"); @@ -5018,12 +5088,50 @@ static int mov_read_dfla(MOVContext *c, AVIOContext *pb, MOVAtom atom) return 0; } -static int cenc_filter(MOVContext *c, MOVStreamContext *sc, uint8_t *input, int size) +static int mov_seek_auxiliary_info(MOVContext *c, MOVStreamContext *sc, int64_t index) +{ + size_t auxiliary_info_seek_offset = 0; + int i; + + if (sc->cenc.auxiliary_info_default_size) { + auxiliary_info_seek_offset = (size_t)sc->cenc.auxiliary_info_default_size * index; + } else if (sc->cenc.auxiliary_info_sizes) { + if (index > sc->cenc.auxiliary_info_sizes_count) { + av_log(c, AV_LOG_ERROR, "current sample %"PRId64" greater than the number of auxiliary info sample sizes %"SIZE_SPECIFIER"\n", + index, sc->cenc.auxiliary_info_sizes_count); + return AVERROR_INVALIDDATA; + } + + for (i = 0; i < index; i++) { + auxiliary_info_seek_offset += sc->cenc.auxiliary_info_sizes[i]; + } + } + + if (auxiliary_info_seek_offset > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info) { + av_log(c, AV_LOG_ERROR, "auxiliary info offset %"SIZE_SPECIFIER" greater than auxiliary info size %"SIZE_SPECIFIER"\n", + auxiliary_info_seek_offset, (size_t)(sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info)); + return AVERROR_INVALIDDATA; + } + + sc->cenc.auxiliary_info_pos = sc->cenc.auxiliary_info + auxiliary_info_seek_offset; + sc->cenc.auxiliary_info_index = index; + return 0; +} + +static int cenc_filter(MOVContext *c, MOVStreamContext *sc, int64_t index, uint8_t *input, int size) { uint32_t encrypted_bytes; uint16_t subsample_count; uint16_t clear_bytes; uint8_t* input_end = input + size; + int ret; + + if (index != sc->cenc.auxiliary_info_index) { + ret = mov_seek_auxiliary_info(c, sc, index); + if (ret < 0) { + return ret; + } + } /* read the iv */ if (AES_CTR_IV_SIZE > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info_pos) { @@ -5081,36 +5189,7 @@ static int cenc_filter(MOVContext *c, MOVStreamContext *sc, uint8_t *input, int return AVERROR_INVALIDDATA; } - return 0; -} - -static int mov_seek_auxiliary_info(AVFormatContext *s, MOVStreamContext *sc) -{ - size_t auxiliary_info_seek_offset = 0; - int i; - - if (sc->cenc.auxiliary_info_default_size) { - auxiliary_info_seek_offset = (size_t)sc->cenc.auxiliary_info_default_size * sc->current_sample; - } else if (sc->cenc.auxiliary_info_sizes) { - if (sc->current_sample > sc->cenc.auxiliary_info_sizes_count) { - av_log(s, AV_LOG_ERROR, "current sample %d greater than the number of auxiliary info sample sizes %"SIZE_SPECIFIER"\n", - sc->current_sample, sc->cenc.auxiliary_info_sizes_count); - return AVERROR_INVALIDDATA; - } - - for (i = 0; i < sc->current_sample; i++) { - auxiliary_info_seek_offset += sc->cenc.auxiliary_info_sizes[i]; - } - } - - if (auxiliary_info_seek_offset > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info) { - av_log(s, AV_LOG_ERROR, "auxiliary info offset %"SIZE_SPECIFIER" greater than auxiliary info size %"SIZE_SPECIFIER"\n", - auxiliary_info_seek_offset, (size_t)(sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info)); - return AVERROR_INVALIDDATA; - } - - sc->cenc.auxiliary_info_pos = sc->cenc.auxiliary_info + auxiliary_info_seek_offset; - + sc->cenc.auxiliary_info_index++; return 0; } @@ -5605,6 +5684,7 @@ static int mov_read_close(AVFormatContext *s) av_freep(&sc->elst_data); av_freep(&sc->rap_group); av_freep(&sc->display_matrix); + av_freep(&sc->index_ranges); if (sc->extradata) for (j = 0; j < sc->stsd_count; j++) @@ -6083,6 +6163,7 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt) MOVStreamContext *sc; AVIndexEntry *sample; AVStream *st = NULL; + int64_t current_index; int ret; mov->fc = s; retry: @@ -6096,7 +6177,8 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt) } sc = st->priv_data; /* must be done just before reading, to avoid infinite loop on sample */ - sc->current_sample++; + current_index = sc->current_index; + mov_current_sample_inc(sc); if (mov->next_root_atom) { sample->pos = FFMIN(sample->pos, mov->next_root_atom); @@ -6108,7 +6190,9 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt) if (ret64 != sample->pos) { av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n", sc->ffindex, sample->pos); - sc->current_sample -= should_retry(sc->pb, ret64); + if (should_retry(sc->pb, ret64)) { + mov_current_sample_dec(sc); + } return AVERROR_INVALIDDATA; } @@ -6119,7 +6203,9 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt) ret = av_get_packet(sc->pb, pkt, sample->size); if (ret < 0) { - sc->current_sample -= should_retry(sc->pb, ret); + if (should_retry(sc->pb, ret)) { + mov_current_sample_dec(sc); + } return ret; } if (sc->has_palette) { @@ -6197,7 +6283,7 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt) aax_filter(pkt->data, pkt->size, mov); if (sc->cenc.aes_ctr) { - ret = cenc_filter(mov, sc, pkt->data, pkt->size); + ret = cenc_filter(mov, sc, current_index, pkt->data, pkt->size); if (ret) { return ret; } @@ -6248,7 +6334,7 @@ static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, sample = 0; if (sample < 0) /* not sure what to do */ return AVERROR_INVALIDDATA; - sc->current_sample = sample; + mov_current_sample_set(sc, sample); av_log(s, AV_LOG_TRACE, "stream %d, found sample %d\n", st->index, sc->current_sample); /* adjust ctts index */ if (sc->ctts_data) { @@ -6276,11 +6362,6 @@ static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, time_sample = next; } - ret = mov_seek_auxiliary_info(s, sc); - if (ret < 0) { - return ret; - } - return sample; } @@ -6320,7 +6401,7 @@ static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_ti MOVStreamContext *sc; st = s->streams[i]; sc = st->priv_data; - sc->current_sample = 0; + mov_current_sample_set(sc, 0); } while (1) { MOVStreamContext *sc; @@ -6330,7 +6411,7 @@ static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_ti sc = st->priv_data; if (sc->ffindex == stream_index && sc->current_sample == sample) break; - sc->current_sample++; + mov_current_sample_inc(sc); } } return 0; |