@@ -263,7 +263,7 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
{
MPEG12EncContext *const mpeg12 = (MPEG12EncContext*)s;
unsigned int vbv_buffer_size, fps, v;
- int i, constraint_parameter_flag;
+ int constraint_parameter_flag;
AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
uint64_t time_code;
int64_t best_aspect_error = INT64_MAX;
@@ -276,146 +276,145 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
+ /* MPEG-1 header repeated every GOP */
+ put_header(s, SEQ_START_CODE);
- /* MPEG-1 header repeated every GOP */
- put_header(s, SEQ_START_CODE);
+ put_sbits(&s->pb, 12, s->width & 0xFFF);
+ put_sbits(&s->pb, 12, s->height & 0xFFF);
- put_sbits(&s->pb, 12, s->width & 0xFFF);
- put_sbits(&s->pb, 12, s->height & 0xFFF);
-
- for (i = 1; i < 15; i++) {
- int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
- if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
- error -= (1LL<<32) / ff_mpeg1_aspect[i];
- else
- error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
+ for (int i = 1; i < 15; i++) {
+ int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
+ if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
+ error -= (1LL<<32) / ff_mpeg1_aspect[i];
+ else
+ error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
- error = FFABS(error);
+ error = FFABS(error);
- if (error - 2 <= best_aspect_error) {
- best_aspect_error = error;
- aspect_ratio_info = i;
- }
+ if (error - 2 <= best_aspect_error) {
+ best_aspect_error = error;
+ aspect_ratio_info = i;
}
+ }
- put_bits(&s->pb, 4, aspect_ratio_info);
- put_bits(&s->pb, 4, s->frame_rate_index);
+ put_bits(&s->pb, 4, aspect_ratio_info);
+ put_bits(&s->pb, 4, s->frame_rate_index);
- if (s->avctx->rc_max_rate) {
- v = (s->avctx->rc_max_rate + 399) / 400;
- if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
- v = 0x3ffff;
- } else {
- v = 0x3FFFF;
- }
+ if (s->avctx->rc_max_rate) {
+ v = (s->avctx->rc_max_rate + 399) / 400;
+ if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
+ v = 0x3ffff;
+ } else {
+ v = 0x3FFFF;
+ }
- if (s->avctx->rc_buffer_size)
- vbv_buffer_size = s->avctx->rc_buffer_size;
- else
- /* VBV calculation: Scaled so that a VCD has the proper
- * VBV size of 40 kilobytes */
- vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
- vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
-
- put_sbits(&s->pb, 18, v);
- put_bits(&s->pb, 1, 1); // marker
- put_sbits(&s->pb, 10, vbv_buffer_size);
-
- constraint_parameter_flag =
- s->width <= 768 &&
- s->height <= 576 &&
- s->mb_width * s->mb_height <= 396 &&
- s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
- framerate.num <= framerate.den * 30 &&
- s->avctx->me_range &&
- s->avctx->me_range < 128 &&
- vbv_buffer_size <= 20 &&
- v <= 1856000 / 400 &&
- s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
-
- put_bits(&s->pb, 1, constraint_parameter_flag);
-
- ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
- ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
-
- if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
- AVFrameSideData *side_data;
- int width = s->width;
- int height = s->height;
- int use_seq_disp_ext;
+ if (s->avctx->rc_buffer_size)
+ vbv_buffer_size = s->avctx->rc_buffer_size;
+ else
+ /* VBV calculation: Scaled so that a VCD has the proper
+ * VBV size of 40 kilobytes */
+ vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
+ vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
+
+ put_sbits(&s->pb, 18, v);
+ put_bits(&s->pb, 1, 1); // marker
+ put_sbits(&s->pb, 10, vbv_buffer_size);
+
+ constraint_parameter_flag =
+ s->width <= 768 &&
+ s->height <= 576 &&
+ s->mb_width * s->mb_height <= 396 &&
+ s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
+ framerate.num <= framerate.den * 30 &&
+ s->avctx->me_range &&
+ s->avctx->me_range < 128 &&
+ vbv_buffer_size <= 20 &&
+ v <= 1856000 / 400 &&
+ s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
+
+ put_bits(&s->pb, 1, constraint_parameter_flag);
+
+ ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
+ ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
- put_header(s, EXT_START_CODE);
- put_bits(&s->pb, 4, 1); // seq ext
-
- put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
-
- put_bits(&s->pb, 3, s->avctx->profile); // profile
- put_bits(&s->pb, 4, s->avctx->level); // level
-
- put_bits(&s->pb, 1, s->progressive_sequence);
- put_bits(&s->pb, 2, s->chroma_format);
- put_bits(&s->pb, 2, s->width >> 12);
- put_bits(&s->pb, 2, s->height >> 12);
- put_bits(&s->pb, 12, v >> 18); // bitrate ext
- put_bits(&s->pb, 1, 1); // marker
- put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
- put_bits(&s->pb, 1, s->low_delay);
- put_bits(&s->pb, 2, mpeg12->frame_rate_ext.num-1); // frame_rate_ext_n
- put_bits(&s->pb, 5, mpeg12->frame_rate_ext.den-1); // frame_rate_ext_d
-
- side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
- if (side_data) {
- AVPanScan *pan_scan = (AVPanScan *)side_data->data;
- if (pan_scan->width && pan_scan->height) {
- width = pan_scan->width >> 4;
- height = pan_scan->height >> 4;
- }
- }
+ if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
+ const AVFrameSideData *side_data;
+ int width = s->width;
+ int height = s->height;
+ int use_seq_disp_ext;
- use_seq_disp_ext = (width != s->width ||
- height != s->height ||
- s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
- s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
- s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
- mpeg12->video_format != VIDEO_FORMAT_UNSPECIFIED);
-
- if (mpeg12->seq_disp_ext == 1 ||
- (mpeg12->seq_disp_ext == -1 && use_seq_disp_ext)) {
- put_header(s, EXT_START_CODE);
- put_bits(&s->pb, 4, 2); // sequence display extension
- put_bits(&s->pb, 3, mpeg12->video_format); // video_format
- put_bits(&s->pb, 1, 1); // colour_description
- put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
- put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
- put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
- put_bits(&s->pb, 14, width); // display_horizontal_size
- put_bits(&s->pb, 1, 1); // marker_bit
- put_bits(&s->pb, 14, height); // display_vertical_size
- put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
+ put_header(s, EXT_START_CODE);
+ put_bits(&s->pb, 4, 1); // seq ext
+
+ put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
+
+ put_bits(&s->pb, 3, s->avctx->profile); // profile
+ put_bits(&s->pb, 4, s->avctx->level); // level
+
+ put_bits(&s->pb, 1, s->progressive_sequence);
+ put_bits(&s->pb, 2, s->chroma_format);
+ put_bits(&s->pb, 2, s->width >> 12);
+ put_bits(&s->pb, 2, s->height >> 12);
+ put_bits(&s->pb, 12, v >> 18); // bitrate ext
+ put_bits(&s->pb, 1, 1); // marker
+ put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
+ put_bits(&s->pb, 1, s->low_delay);
+ put_bits(&s->pb, 2, mpeg12->frame_rate_ext.num-1); // frame_rate_ext_n
+ put_bits(&s->pb, 5, mpeg12->frame_rate_ext.den-1); // frame_rate_ext_d
+
+ side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
+ if (side_data) {
+ const AVPanScan *pan_scan = (AVPanScan *)side_data->data;
+ if (pan_scan->width && pan_scan->height) {
+ width = pan_scan->width >> 4;
+ height = pan_scan->height >> 4;
}
}
- put_header(s, GOP_START_CODE);
- put_bits(&s->pb, 1, mpeg12->drop_frame_timecode); // drop frame flag
- /* time code: we must convert from the real frame rate to a
- * fake MPEG frame rate in case of low frame rate */
- fps = (framerate.num + framerate.den / 2) / framerate.den;
- time_code = s->current_picture_ptr->f->coded_picture_number +
- mpeg12->timecode_frame_start;
-
- s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
-
- av_assert0(mpeg12->drop_frame_timecode == !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
- if (mpeg12->drop_frame_timecode)
- time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
-
- put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
- put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
- put_bits(&s->pb, 1, 1);
- put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
- put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
- put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
- put_bits(&s->pb, 1, 0); // broken link
+ use_seq_disp_ext = (width != s->width ||
+ height != s->height ||
+ s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
+ s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
+ s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
+ mpeg12->video_format != VIDEO_FORMAT_UNSPECIFIED);
+
+ if (mpeg12->seq_disp_ext == 1 ||
+ (mpeg12->seq_disp_ext == -1 && use_seq_disp_ext)) {
+ put_header(s, EXT_START_CODE);
+ put_bits(&s->pb, 4, 2); // sequence display extension
+ put_bits(&s->pb, 3, mpeg12->video_format); // video_format
+ put_bits(&s->pb, 1, 1); // colour_description
+ put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
+ put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
+ put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
+ put_bits(&s->pb, 14, width); // display_horizontal_size
+ put_bits(&s->pb, 1, 1); // marker_bit
+ put_bits(&s->pb, 14, height); // display_vertical_size
+ put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
+ }
+ }
+
+ put_header(s, GOP_START_CODE);
+ put_bits(&s->pb, 1, mpeg12->drop_frame_timecode); // drop frame flag
+ /* time code: we must convert from the real frame rate to a
+ * fake MPEG frame rate in case of low frame rate */
+ fps = (framerate.num + framerate.den / 2) / framerate.den;
+ time_code = s->current_picture_ptr->f->coded_picture_number +
+ mpeg12->timecode_frame_start;
+
+ s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
+
+ av_assert0(mpeg12->drop_frame_timecode == !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
+ if (mpeg12->drop_frame_timecode)
+ time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
+
+ put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
+ put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
+ put_bits(&s->pb, 1, 1);
+ put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
+ put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
+ put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
+ put_bits(&s->pb, 1, 0); // broken link
}
static inline void encode_mb_skip_run(MpegEncContext *s, int run)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com> --- libavcodec/mpeg12enc.c | 255 ++++++++++++++++++++--------------------- 1 file changed, 127 insertions(+), 128 deletions(-)