Merge commit '304e916a92bc17385a485bec2f957e192257ddb6'
[ffmpeg.git] / libavcodec / h264_sei.c
index 2e4017b67c89065f51bc28d065956fab10e6bddd..3acd0ccd2877b6f933b62b5be3910812fd2b91ff 100644 (file)
@@ -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
  */
 
@@ -47,14 +47,20 @@ void ff_h264_reset_sei(H264Context *h)
 
 static int decode_picture_timing(H264Context *h)
 {
-    if (h->sps.nal_hrd_parameters_present_flag ||
-        h->sps.vcl_hrd_parameters_present_flag) {
-        h->sei_cpb_removal_delay = get_bits(&h->gb,
-                                            h->sps.cpb_removal_delay_length);
-        h->sei_dpb_output_delay  = get_bits(&h->gb,
-                                            h->sps.dpb_output_delay_length);
+    SPS *sps = &h->sps;
+    int i;
+
+    for (i = 0; i<MAX_SPS_COUNT; i++)
+        if (!sps->log2_max_frame_num && h->sps_buffers[i])
+            sps = h->sps_buffers[i];
+
+    if (sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag) {
+        h->sei_cpb_removal_delay = get_bits_long(&h->gb,
+                                                 sps->cpb_removal_delay_length);
+        h->sei_dpb_output_delay  = get_bits_long(&h->gb,
+                                                 sps->dpb_output_delay_length);
     }
-    if (h->sps.pic_struct_present_flag) {
+    if (sps->pic_struct_present_flag) {
         unsigned int i, num_clock_ts;
 
         h->sei_pic_struct = get_bits(&h->gb, 4);
@@ -90,9 +96,9 @@ static int decode_picture_timing(H264Context *h)
                         }
                     }
                 }
-                if (h->sps.time_offset_length > 0)
+                if (sps->time_offset_length > 0)
                     skip_bits(&h->gb,
-                              h->sps.time_offset_length); /* time_offset */
+                              sps->time_offset_length); /* time_offset */
             }
         }
 
@@ -103,6 +109,43 @@ static int decode_picture_timing(H264Context *h)
     return 0;
 }
 
+static int decode_user_data_itu_t_t35(H264Context *h, int size)
+{
+    uint32_t user_identifier;
+    int dtg_active_format;
+
+    if (size < 7)
+        return -1;
+    size -= 7;
+
+    skip_bits(&h->gb, 8);   // country_code
+    skip_bits(&h->gb, 16);  // provider_code
+    user_identifier = get_bits_long(&h->gb, 32);
+
+    switch (user_identifier) {
+        case 0x44544731:    // "DTG1" - AFD_data
+            if (size < 1)
+                return -1;
+            skip_bits(&h->gb, 1);
+            if (get_bits(&h->gb, 1)) {
+                skip_bits(&h->gb, 6);
+                if (size < 2)
+                    return -1;
+                skip_bits(&h->gb, 4);
+                dtg_active_format = get_bits(&h->gb, 4);
+                h->avctx->dtg_active_format = dtg_active_format;
+            } else {
+                skip_bits(&h->gb, 6);
+            }
+            break;
+        default:
+            skip_bits(&h->gb, size * 8);
+            break;
+    }
+
+    return 0;
+}
+
 static int decode_unregistered_user_data(H264Context *h, int size)
 {
     uint8_t user_data[16 + 256];
@@ -118,6 +161,8 @@ static int decode_unregistered_user_data(H264Context *h, int size)
     e = sscanf(user_data + 16, "x264 - core %d", &build);
     if (e == 1 && build > 0)
         h->x264_build = build;
+    if (e == 1 && build == 1 && !strncmp(user_data+16, "x264 - core 0000", 16))
+        h->x264_build = 67;
 
     if (h->avctx->debug & FF_DEBUG_BUGS)
         av_log(h->avctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data + 16);
@@ -137,6 +182,9 @@ static int decode_recovery_point(H264Context *h)
      * 2b changing_slice_group_idc */
     skip_bits(&h->gb, 4);
 
+    if (h->avctx->debug & FF_DEBUG_PICT_INFO)
+        av_log(h->avctx, AV_LOG_DEBUG, "sei_recovery_frame_cnt: %d\n", h->sei_recovery_frame_cnt);
+
     return 0;
 }
 
@@ -158,7 +206,7 @@ static int decode_buffering_period(H264Context *h)
     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(&h->gb, sps->initial_cpb_removal_delay_length);
+                get_bits_long(&h->gb, sps->initial_cpb_removal_delay_length);
             // initial_cpb_removal_delay_offset
             skip_bits(&h->gb, sps->initial_cpb_removal_delay_length);
         }
@@ -166,7 +214,7 @@ static int decode_buffering_period(H264Context *h)
     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(&h->gb, sps->initial_cpb_removal_delay_length);
+                get_bits_long(&h->gb, sps->initial_cpb_removal_delay_length);
             // initial_cpb_removal_delay_offset
             skip_bits(&h->gb, sps->initial_cpb_removal_delay_length);
         }
@@ -178,12 +226,16 @@ static int decode_buffering_period(H264Context *h)
 
 static int decode_frame_packing_arrangement(H264Context *h)
 {
-    get_ue_golomb(&h->gb);              // frame_packing_arrangement_id
-    h->sei_frame_packing_present = !get_bits1(&h->gb);
+    h->sei_fpa.frame_packing_arrangement_id          = get_ue_golomb(&h->gb);
+    h->sei_fpa.frame_packing_arrangement_cancel_flag = get_bits1(&h->gb);
+    h->sei_frame_packing_present = !h->sei_fpa.frame_packing_arrangement_cancel_flag;
 
     if (h->sei_frame_packing_present) {
+        h->sei_fpa.frame_packing_arrangement_type =
         h->frame_packing_arrangement_type = get_bits(&h->gb, 7);
+        h->sei_fpa.quincunx_sampling_flag         =
         h->quincunx_subsampling           = get_bits1(&h->gb);
+        h->sei_fpa.content_interpretation_type    =
         h->content_interpretation_type    = get_bits(&h->gb, 6);
 
         // the following skips: spatial_flipping_flag, frame0_flipped_flag,
@@ -194,33 +246,51 @@ static int decode_frame_packing_arrangement(H264Context *h)
         if (!h->quincunx_subsampling && h->frame_packing_arrangement_type != 5)
             skip_bits(&h->gb, 16);      // frame[01]_grid_position_[xy]
         skip_bits(&h->gb, 8);           // frame_packing_arrangement_reserved_byte
-        get_ue_golomb(&h->gb);          // frame_packing_arrangement_repetition_period
+        h->sei_fpa.frame_packing_arrangement_repetition_period = get_ue_golomb(&h->gb) /* frame_packing_arrangement_repetition_period */;
     }
     skip_bits1(&h->gb);                 // frame_packing_arrangement_extension_flag
 
+    if (h->avctx->debug & FF_DEBUG_PICT_INFO)
+        av_log(h->avctx, AV_LOG_DEBUG, "SEI FPA %d %d %d %d %d %d\n",
+                                       h->sei_fpa.frame_packing_arrangement_id,
+                                       h->sei_fpa.frame_packing_arrangement_cancel_flag,
+                                       h->sei_fpa.frame_packing_arrangement_type,
+                                       h->sei_fpa.quincunx_sampling_flag,
+                                       h->sei_fpa.content_interpretation_type,
+                                       h->sei_fpa.frame_packing_arrangement_repetition_period);
+
     return 0;
 }
 
 int ff_h264_decode_sei(H264Context *h)
 {
     while (get_bits_left(&h->gb) > 16) {
-        int size = 0;
         int type = 0;
+        unsigned size = 0;
+        unsigned next;
         int ret  = 0;
 
-        do
+        do {
+            if (get_bits_left(&h->gb) < 8)
+                return AVERROR_INVALIDDATA;
             type += show_bits(&h->gb, 8);
-        while (get_bits(&h->gb, 8) == 255);
+        while (get_bits(&h->gb, 8) == 255);
 
-        do
+        do {
+            if (get_bits_left(&h->gb) < 8)
+                return AVERROR_INVALIDDATA;
             size += show_bits(&h->gb, 8);
-        while (get_bits(&h->gb, 8) == 255);
+        } while (get_bits(&h->gb, 8) == 255);
+
+        if (h->avctx->debug&FF_DEBUG_STARTCODE)
+            av_log(h->avctx, AV_LOG_DEBUG, "SEI %d len:%d\n", type, size);
 
         if (size > get_bits_left(&h->gb) / 8) {
-            av_log(h->avctx, AV_LOG_ERROR, "SEI type %d truncated at %d\n",
-                   type, get_bits_left(&h->gb));
+            av_log(h->avctx, AV_LOG_ERROR, "SEI type %d size %d truncated at %d\n",
+                   type, 8*size, get_bits_left(&h->gb));
             return AVERROR_INVALIDDATA;
         }
+        next = get_bits_count(&h->gb) + 8 * size;
 
         switch (type) {
         case SEI_TYPE_PIC_TIMING: // Picture timing SEI
@@ -228,6 +298,10 @@ int ff_h264_decode_sei(H264Context *h)
             if (ret < 0)
                 return ret;
             break;
+        case SEI_TYPE_USER_DATA_ITU_T_T35:
+            if (decode_user_data_itu_t_t35(h, size) < 0)
+                return -1;
+            break;
         case SEI_TYPE_USER_DATA_UNREGISTERED:
             ret = decode_unregistered_user_data(h, size);
             if (ret < 0)
@@ -250,8 +324,8 @@ int ff_h264_decode_sei(H264Context *h)
             break;
         default:
             av_log(h->avctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type);
-            skip_bits(&h->gb, 8 * size);
         }
+        skip_bits_long(&h->gb, next - get_bits_count(&h->gb));
 
         // FIXME check bits here
         align_get_bits(&h->gb);
@@ -259,3 +333,48 @@ int ff_h264_decode_sei(H264Context *h)
 
     return 0;
 }
+
+const char* ff_h264_sei_stereo_mode(H264Context *h)
+{
+    if (h->sei_fpa.frame_packing_arrangement_cancel_flag == 0) {
+        switch (h->sei_fpa.frame_packing_arrangement_type) {
+            case SEI_FPA_TYPE_CHECKERBOARD:
+                if (h->sei_fpa.content_interpretation_type == 2)
+                    return "checkerboard_rl";
+                else
+                    return "checkerboard_lr";
+            case SEI_FPA_TYPE_INTERLEAVE_COLUMN:
+                if (h->sei_fpa.content_interpretation_type == 2)
+                    return "col_interleaved_rl";
+                else
+                    return "col_interleaved_lr";
+            case SEI_FPA_TYPE_INTERLEAVE_ROW:
+                if (h->sei_fpa.content_interpretation_type == 2)
+                    return "row_interleaved_rl";
+                else
+                    return "row_interleaved_lr";
+            case SEI_FPA_TYPE_SIDE_BY_SIDE:
+                if (h->sei_fpa.content_interpretation_type == 2)
+                    return "right_left";
+                else
+                    return "left_right";
+            case SEI_FPA_TYPE_TOP_BOTTOM:
+                if (h->sei_fpa.content_interpretation_type == 2)
+                    return "bottom_top";
+                else
+                    return "top_bottom";
+            case SEI_FPA_TYPE_INTERLEAVE_TEMPORAL:
+                if (h->sei_fpa.content_interpretation_type == 2)
+                    return "block_rl";
+                else
+                    return "block_lr";
+            case SEI_FPA_TYPE_2D:
+            default:
+                return "mono";
+        }
+    } else if (h->sei_fpa.frame_packing_arrangement_cancel_flag == 1) {
+        return "mono";
+    } else {
+        return NULL;
+    }
+}