diff options
Diffstat (limited to 'libavcodec/h264_sei.c')
-rw-r--r-- | libavcodec/h264_sei.c | 249 |
1 files changed, 174 insertions, 75 deletions
diff --git a/libavcodec/h264_sei.c b/libavcodec/h264_sei.c index da5d33c..d4eb9c0 100644 --- a/libavcodec/h264_sei.c +++ b/libavcodec/h264_sei.c @@ -2,20 +2,20 @@ * H.26L/H.264/AVC/JVT/14496-10/... SEI decoding * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -27,18 +27,19 @@ #include "avcodec.h" #include "get_bits.h" -#include "golomb_legacy.h" +#include "golomb.h" #include "h264_ps.h" #include "h264_sei.h" #include "internal.h" +#define AVERROR_PS_NOT_FOUND FFERRTAG(0xF8,'?','P','S') + static const uint8_t sei_num_clock_ts_table[9] = { 1, 1, 1, 2, 2, 3, 3, 2, 3 }; void ff_h264_sei_uninit(H264SEIContext *h) { - h->unregistered.x264_build = -1; h->recovery_point.recovery_frame_cnt = -1; h->picture_timing.dpb_output_delay = 0; @@ -50,20 +51,28 @@ void ff_h264_sei_uninit(H264SEIContext *h) h->display_orientation.present = 0; h->afd.present = 0; - h->a53_caption.a53_caption_size = 0; - av_freep(&h->a53_caption.a53_caption); + av_buffer_unref(&h->a53_caption.buf_ref); } static int decode_picture_timing(H264SEIPictureTiming *h, GetBitContext *gb, - const SPS *sps, void *logctx) + const H264ParamSets *ps, void *logctx) { - if (!sps) - return AVERROR_INVALIDDATA; + int i; + const SPS *sps = ps->sps; + + for (i = 0; i<MAX_SPS_COUNT; i++) + if ((!sps || !sps->log2_max_frame_num) && ps->sps_list[i]) + sps = (const SPS *)ps->sps_list[i]->data; + + if (!sps) { + av_log(logctx, AV_LOG_ERROR, "SPS unavailable in decode_picture_timing\n"); + return AVERROR_PS_NOT_FOUND; + } if (sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag) { - h->cpb_removal_delay = get_bits(gb, sps->cpb_removal_delay_length); - h->dpb_output_delay = get_bits(gb, sps->dpb_output_delay_length); + h->cpb_removal_delay = get_bits_long(gb, sps->cpb_removal_delay_length); + h->dpb_output_delay = get_bits_long(gb, sps->dpb_output_delay_length); } if (sps->pic_struct_present_flag) { unsigned int i, num_clock_ts; @@ -75,32 +84,38 @@ static int decode_picture_timing(H264SEIPictureTiming *h, GetBitContext *gb, return AVERROR_INVALIDDATA; num_clock_ts = sei_num_clock_ts_table[h->pic_struct]; - + h->timecode_cnt = 0; for (i = 0; i < num_clock_ts; i++) { - if (get_bits(gb, 1)) { /* clock_timestamp_flag */ + if (get_bits(gb, 1)) { /* clock_timestamp_flag */ + H264SEITimeCode *tc = &h->timecode[h->timecode_cnt++]; unsigned int full_timestamp_flag; - + unsigned int counting_type, cnt_dropped_flag; h->ct_type |= 1 << get_bits(gb, 2); - skip_bits(gb, 1); /* nuit_field_based_flag */ - skip_bits(gb, 5); /* counting_type */ + skip_bits(gb, 1); /* nuit_field_based_flag */ + counting_type = get_bits(gb, 5); /* counting_type */ full_timestamp_flag = get_bits(gb, 1); - skip_bits(gb, 1); /* discontinuity_flag */ - skip_bits(gb, 1); /* cnt_dropped_flag */ - skip_bits(gb, 8); /* n_frames */ + skip_bits(gb, 1); /* discontinuity_flag */ + cnt_dropped_flag = get_bits(gb, 1); /* cnt_dropped_flag */ + if (cnt_dropped_flag && counting_type > 1 && counting_type < 7) + tc->dropframe = 1; + tc->frame = get_bits(gb, 8); /* n_frames */ if (full_timestamp_flag) { - skip_bits(gb, 6); /* seconds_value 0..59 */ - skip_bits(gb, 6); /* minutes_value 0..59 */ - skip_bits(gb, 5); /* hours_value 0..23 */ + tc->full = 1; + tc->seconds = get_bits(gb, 6); /* seconds_value 0..59 */ + tc->minutes = get_bits(gb, 6); /* minutes_value 0..59 */ + tc->hours = get_bits(gb, 5); /* hours_value 0..23 */ } else { - if (get_bits(gb, 1)) { /* seconds_flag */ - skip_bits(gb, 6); /* seconds_value range 0..59 */ - if (get_bits(gb, 1)) { /* minutes_flag */ - skip_bits(gb, 6); /* minutes_value 0..59 */ - if (get_bits(gb, 1)) /* hours_flag */ - skip_bits(gb, 5); /* hours_value 0..23 */ + tc->seconds = tc->minutes = tc->hours = tc->full = 0; + if (get_bits(gb, 1)) { /* seconds_flag */ + tc->seconds = get_bits(gb, 6); + if (get_bits(gb, 1)) { /* minutes_flag */ + tc->minutes = get_bits(gb, 6); + if (get_bits(gb, 1)) /* hours_flag */ + tc->hours = get_bits(gb, 5); } } } + if (sps->time_offset_length > 0) skip_bits(gb, sps->time_offset_length); /* time_offset */ @@ -159,7 +174,8 @@ static int decode_registered_user_data_closed_caption(H264SEIA53Caption *h, size -= 2; if (cc_count && size >= cc_count * 3) { - const uint64_t new_size = (h->a53_caption_size + cc_count + int old_size = h->buf_ref ? h->buf_ref->size : 0; + const uint64_t new_size = (old_size + cc_count * UINT64_C(3)); int i, ret; @@ -167,14 +183,15 @@ static int decode_registered_user_data_closed_caption(H264SEIA53Caption *h, return AVERROR(EINVAL); /* Allow merging of the cc data from two fields. */ - ret = av_reallocp(&h->a53_caption, new_size); + ret = av_buffer_realloc(&h->buf_ref, new_size); if (ret < 0) return ret; + /* Use of av_buffer_realloc assumes buffer is writeable */ for (i = 0; i < cc_count; i++) { - h->a53_caption[h->a53_caption_size++] = get_bits(gb, 8); - h->a53_caption[h->a53_caption_size++] = get_bits(gb, 8); - h->a53_caption[h->a53_caption_size++] = get_bits(gb, 8); + h->buf_ref->data[old_size++] = get_bits(gb, 8); + h->buf_ref->data[old_size++] = get_bits(gb, 8); + h->buf_ref->data[old_size++] = get_bits(gb, 8); } skip_bits(gb, 8); // marker_bits @@ -182,8 +199,6 @@ static int decode_registered_user_data_closed_caption(H264SEIA53Caption *h, } } else { int i; - avpriv_request_sample(logctx, "Subtitles with data type 0x%02x", - user_data_type_code); for (i = 0; i < size - 1; i++) skip_bits(gb, 8); } @@ -246,18 +261,23 @@ static int decode_unregistered_user_data(H264SEIUnregistered *h, GetBitContext * e = sscanf(user_data + 16, "x264 - core %d", &build); if (e == 1 && build > 0) h->x264_build = build; - - if (strlen(user_data + 16) > 0) - av_log(logctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data + 16); + if (e == 1 && build == 1 && !strncmp(user_data+16, "x264 - core 0000", 16)) + h->x264_build = 67; av_free(user_data); return 0; } -static int decode_recovery_point(H264SEIRecoveryPoint *h, GetBitContext *gb) +static int decode_recovery_point(H264SEIRecoveryPoint *h, GetBitContext *gb, void *logctx) { - h->recovery_frame_cnt = get_ue_golomb(gb); + unsigned recovery_frame_cnt = get_ue_golomb_long(gb); + if (recovery_frame_cnt >= (1<<MAX_LOG2_MAX_FRAME_NUM)) { + av_log(logctx, AV_LOG_ERROR, "recovery_frame_cnt %u is out of range\n", recovery_frame_cnt); + return AVERROR_INVALIDDATA; + } + + h->recovery_frame_cnt = recovery_frame_cnt; /* 1b exact_match_flag, * 1b broken_link_flag, * 2b changing_slice_group_idc */ @@ -271,21 +291,21 @@ static int decode_buffering_period(H264SEIBufferingPeriod *h, GetBitContext *gb, { unsigned int sps_id; int sched_sel_idx; - SPS *sps; + const SPS *sps; sps_id = get_ue_golomb_31(gb); if (sps_id > 31 || !ps->sps_list[sps_id]) { av_log(logctx, AV_LOG_ERROR, "non-existing SPS %d referenced in buffering period\n", sps_id); - return AVERROR_INVALIDDATA; + return sps_id > 31 ? AVERROR_INVALIDDATA : AVERROR_PS_NOT_FOUND; } - sps = (SPS*)ps->sps_list[sps_id]->data; + sps = (const SPS*)ps->sps_list[sps_id]->data; // NOTE: This is really so duplicated in the standard... See H.264, D.1.1 if (sps->nal_hrd_parameters_present_flag) { for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) { h->initial_cpb_removal_delay[sched_sel_idx] = - get_bits(gb, sps->initial_cpb_removal_delay_length); + get_bits_long(gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset skip_bits(gb, sps->initial_cpb_removal_delay_length); } @@ -293,7 +313,7 @@ static int decode_buffering_period(H264SEIBufferingPeriod *h, GetBitContext *gb, if (sps->vcl_hrd_parameters_present_flag) { for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) { h->initial_cpb_removal_delay[sched_sel_idx] = - get_bits(gb, sps->initial_cpb_removal_delay_length); + get_bits_long(gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset skip_bits(gb, sps->initial_cpb_removal_delay_length); } @@ -306,12 +326,13 @@ static int decode_buffering_period(H264SEIBufferingPeriod *h, GetBitContext *gb, static int decode_frame_packing_arrangement(H264SEIFramePacking *h, GetBitContext *gb) { - get_ue_golomb(gb); // frame_packing_arrangement_id - h->present = !get_bits1(gb); + h->arrangement_id = get_ue_golomb_long(gb); + h->arrangement_cancel_flag = get_bits1(gb); + h->present = !h->arrangement_cancel_flag; if (h->present) { h->arrangement_type = get_bits(gb, 7); - h->quincunx_subsampling = get_bits1(gb); + h->quincunx_sampling_flag = get_bits1(gb); h->content_interpretation_type = get_bits(gb, 6); // spatial_flipping_flag, frame0_flipped_flag, field_views_flag @@ -320,10 +341,10 @@ static int decode_frame_packing_arrangement(H264SEIFramePacking *h, // frame0_self_contained_flag, frame1_self_contained_flag skip_bits(gb, 2); - if (!h->quincunx_subsampling && h->arrangement_type != 5) + if (!h->quincunx_sampling_flag && h->arrangement_type != 5) skip_bits(gb, 16); // frame[01]_grid_position_[xy] skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte - get_ue_golomb(gb); // frame_packing_arrangement_repetition_period + h->arrangement_repetition_period = get_ue_golomb_long(gb); } skip_bits1(gb); // frame_packing_arrangement_extension_flag @@ -340,8 +361,33 @@ static int decode_display_orientation(H264SEIDisplayOrientation *h, h->vflip = get_bits1(gb); // ver_flip h->anticlockwise_rotation = get_bits(gb, 16); - get_ue_golomb(gb); // display_orientation_repetition_period - skip_bits1(gb); // display_orientation_extension_flag + get_ue_golomb_long(gb); // display_orientation_repetition_period + skip_bits1(gb); // display_orientation_extension_flag + } + + return 0; +} + +static int decode_green_metadata(H264SEIGreenMetaData *h, GetBitContext *gb) +{ + h->green_metadata_type = get_bits(gb, 8); + + if (h->green_metadata_type == 0) { + h->period_type = get_bits(gb, 8); + + if (h->period_type == 2) + h->num_seconds = get_bits(gb, 16); + else if (h->period_type == 3) + h->num_pictures = get_bits(gb, 16); + + h->percent_non_zero_macroblocks = get_bits(gb, 8); + h->percent_intra_coded_macroblocks = get_bits(gb, 8); + h->percent_six_tap_filtering = get_bits(gb, 8); + h->percent_alpha_point_deblocking_instance = get_bits(gb, 8); + + } else if (h->green_metadata_type == 1) { + h->xsd_metric_type = get_bits(gb, 8); + h->xsd_metric_value = get_bits(gb, 16); } return 0; @@ -358,34 +404,36 @@ static int decode_alternative_transfer(H264SEIAlternativeTransfer *h, int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, const H264ParamSets *ps, void *logctx) { - while (get_bits_left(gb) > 16) { - int size = 0; + int master_ret = 0; + + while (get_bits_left(gb) > 16 && show_bits(gb, 16)) { int type = 0; + unsigned size = 0; + unsigned next; int ret = 0; - int last = 0; - while (get_bits_left(gb) >= 8 && - (last = get_bits(gb, 8)) == 255) { - type += 255; - } - type += last; + do { + if (get_bits_left(gb) < 8) + return AVERROR_INVALIDDATA; + type += show_bits(gb, 8); + } while (get_bits(gb, 8) == 255); - last = 0; - while (get_bits_left(gb) >= 8 && - (last = get_bits(gb, 8)) == 255) { - size += 255; - } - size += last; + do { + if (get_bits_left(gb) < 8) + return AVERROR_INVALIDDATA; + size += show_bits(gb, 8); + } while (get_bits(gb, 8) == 255); if (size > get_bits_left(gb) / 8) { - av_log(logctx, AV_LOG_ERROR, "SEI type %d truncated at %d\n", - type, get_bits_left(gb)); + av_log(logctx, AV_LOG_ERROR, "SEI type %d size %d truncated at %d\n", + type, 8*size, get_bits_left(gb)); return AVERROR_INVALIDDATA; } + next = get_bits_count(gb) + 8 * size; switch (type) { case H264_SEI_TYPE_PIC_TIMING: // Picture timing SEI - ret = decode_picture_timing(&h->picture_timing, gb, ps->sps, logctx); + ret = decode_picture_timing(&h->picture_timing, gb, ps, logctx); break; case H264_SEI_TYPE_USER_DATA_REGISTERED: ret = decode_registered_user_data(h, gb, logctx, size); @@ -394,7 +442,7 @@ int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, ret = decode_unregistered_user_data(&h->unregistered, gb, logctx, size); break; case H264_SEI_TYPE_RECOVERY_POINT: - ret = decode_recovery_point(&h->recovery_point, gb); + ret = decode_recovery_point(&h->recovery_point, gb, logctx); break; case H264_SEI_TYPE_BUFFERING_PERIOD: ret = decode_buffering_period(&h->buffering_period, gb, ps, logctx); @@ -405,19 +453,70 @@ int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, case H264_SEI_TYPE_DISPLAY_ORIENTATION: ret = decode_display_orientation(&h->display_orientation, gb); break; + case H264_SEI_TYPE_GREEN_METADATA: + ret = decode_green_metadata(&h->green_metadata, gb); + break; case H264_SEI_TYPE_ALTERNATIVE_TRANSFER: ret = decode_alternative_transfer(&h->alternative_transfer, gb); break; default: av_log(logctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type); - skip_bits(gb, 8 * size); } - if (ret < 0) + if (ret < 0 && ret != AVERROR_PS_NOT_FOUND) return ret; + if (ret < 0) + master_ret = ret; + + skip_bits_long(gb, next - get_bits_count(gb)); // FIXME check bits here align_get_bits(gb); } - return 0; + return master_ret; +} + +const char *ff_h264_sei_stereo_mode(const H264SEIFramePacking *h) +{ + if (h->arrangement_cancel_flag == 0) { + switch (h->arrangement_type) { + case H264_SEI_FPA_TYPE_CHECKERBOARD: + if (h->content_interpretation_type == 2) + return "checkerboard_rl"; + else + return "checkerboard_lr"; + case H264_SEI_FPA_TYPE_INTERLEAVE_COLUMN: + if (h->content_interpretation_type == 2) + return "col_interleaved_rl"; + else + return "col_interleaved_lr"; + case H264_SEI_FPA_TYPE_INTERLEAVE_ROW: + if (h->content_interpretation_type == 2) + return "row_interleaved_rl"; + else + return "row_interleaved_lr"; + case H264_SEI_FPA_TYPE_SIDE_BY_SIDE: + if (h->content_interpretation_type == 2) + return "right_left"; + else + return "left_right"; + case H264_SEI_FPA_TYPE_TOP_BOTTOM: + if (h->content_interpretation_type == 2) + return "bottom_top"; + else + return "top_bottom"; + case H264_SEI_FPA_TYPE_INTERLEAVE_TEMPORAL: + if (h->content_interpretation_type == 2) + return "block_rl"; + else + return "block_lr"; + case H264_SEI_FPA_TYPE_2D: + default: + return "mono"; + } + } else if (h->arrangement_cancel_flag == 1) { + return "mono"; + } else { + return NULL; + } } |