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https://github.com/librempeg/librempeg
synced 2024-11-23 11:39:47 +00:00
vc1: export some functions
This is a preparatory step for the MSS2 decoder which needs to use the WMV9 decoder to decode some kinds of frames. From the patch by Alberto Delmás <adelmas@gmail.com>
This commit is contained in:
Kostya Shishkov
parent
ae43c4c0c0
commit
7627c35a81
@ -451,4 +451,9 @@ int ff_vc1_parse_frame_header (VC1Context *v, GetBitContext *gb);
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int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext *gb);
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int ff_vc1_init_common(VC1Context *v);
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av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v);
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av_cold void ff_vc1_init_transposed_scantables(VC1Context *v);
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av_cold int ff_vc1_decode_end(AVCodecContext *avctx);
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void ff_vc1_decode_blocks(VC1Context *v);
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#endif /* AVCODEC_VC1_H */
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@ -4732,7 +4732,7 @@ static void vc1_decode_skip_blocks(VC1Context *v)
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s->pict_type = AV_PICTURE_TYPE_P;
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}
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static void vc1_decode_blocks(VC1Context *v)
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void ff_vc1_decode_blocks(VC1Context *v)
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{
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v->s.esc3_level_length = 0;
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@ -5046,7 +5046,7 @@ static void vc1_sprite_flush(AVCodecContext *avctx)
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#endif
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static av_cold int vc1_decode_init_alloc_tables(VC1Context *v)
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av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v)
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{
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MpegEncContext *s = &v->s;
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int i;
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@ -5112,6 +5112,21 @@ static av_cold int vc1_decode_init_alloc_tables(VC1Context *v)
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return 0;
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}
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av_cold void ff_vc1_init_transposed_scantables(VC1Context *v)
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{
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int i;
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for (i = 0; i < 64; i++) {
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#define transpose(x) ((x >> 3) | ((x & 7) << 3))
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v->zz_8x8[0][i] = transpose(ff_wmv1_scantable[0][i]);
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v->zz_8x8[1][i] = transpose(ff_wmv1_scantable[1][i]);
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v->zz_8x8[2][i] = transpose(ff_wmv1_scantable[2][i]);
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v->zz_8x8[3][i] = transpose(ff_wmv1_scantable[3][i]);
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v->zzi_8x8[i] = transpose(ff_vc1_adv_interlaced_8x8_zz[i]);
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}
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v->left_blk_sh = 0;
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v->top_blk_sh = 3;
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}
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/** Initialize a VC1/WMV3 decoder
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* @todo TODO: Handle VC-1 IDUs (Transport level?)
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* @todo TODO: Decypher remaining bits in extra_data
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@ -5121,7 +5136,6 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx)
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VC1Context *v = avctx->priv_data;
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MpegEncContext *s = &v->s;
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GetBitContext gb;
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int i;
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/* save the container output size for WMImage */
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v->output_width = avctx->width;
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@ -5224,16 +5238,7 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx)
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s->mb_height = (avctx->coded_height + 15) >> 4;
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if (v->profile == PROFILE_ADVANCED || v->res_fasttx) {
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for (i = 0; i < 64; i++) {
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#define transpose(x) ((x >> 3) | ((x & 7) << 3))
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v->zz_8x8[0][i] = transpose(ff_wmv1_scantable[0][i]);
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v->zz_8x8[1][i] = transpose(ff_wmv1_scantable[1][i]);
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v->zz_8x8[2][i] = transpose(ff_wmv1_scantable[2][i]);
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v->zz_8x8[3][i] = transpose(ff_wmv1_scantable[3][i]);
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v->zzi_8x8[i] = transpose(ff_vc1_adv_interlaced_8x8_zz[i]);
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}
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v->left_blk_sh = 0;
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v->top_blk_sh = 3;
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ff_vc1_init_transposed_scantables(v);
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} else {
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memcpy(v->zz_8x8, ff_wmv1_scantable, 4*64);
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v->left_blk_sh = 3;
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@ -5259,7 +5264,7 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx)
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/** Close a VC1/WMV3 decoder
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* @warning Initial try at using MpegEncContext stuff
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*/
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static av_cold int vc1_decode_end(AVCodecContext *avctx)
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av_cold int ff_vc1_decode_end(AVCodecContext *avctx)
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{
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VC1Context *v = avctx->priv_data;
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int i;
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@ -5448,11 +5453,11 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
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if (s->context_initialized &&
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(s->width != avctx->coded_width ||
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s->height != avctx->coded_height)) {
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vc1_decode_end(avctx);
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ff_vc1_decode_end(avctx);
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}
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if (!s->context_initialized) {
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if (ff_msmpeg4_decode_init(avctx) < 0 || vc1_decode_init_alloc_tables(v) < 0)
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if (ff_msmpeg4_decode_init(avctx) < 0 || ff_vc1_decode_init_alloc_tables(v) < 0)
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return -1;
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s->low_delay = !avctx->has_b_frames || v->res_sprite;
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@ -5597,7 +5602,7 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
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s->end_mb_y = (i == n_slices ) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
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else
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s->end_mb_y = (i <= n_slices1 + 1) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
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vc1_decode_blocks(v);
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ff_vc1_decode_blocks(v);
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if (i != n_slices)
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s->gb = slices[i].gb;
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}
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@ -5675,7 +5680,7 @@ AVCodec ff_vc1_decoder = {
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.id = AV_CODEC_ID_VC1,
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.priv_data_size = sizeof(VC1Context),
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.init = vc1_decode_init,
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.close = vc1_decode_end,
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.close = ff_vc1_decode_end,
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.decode = vc1_decode_frame,
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.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
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.long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),
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@ -5690,7 +5695,7 @@ AVCodec ff_wmv3_decoder = {
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.id = AV_CODEC_ID_WMV3,
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.priv_data_size = sizeof(VC1Context),
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.init = vc1_decode_init,
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.close = vc1_decode_end,
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.close = ff_vc1_decode_end,
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.decode = vc1_decode_frame,
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.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
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.long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),
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@ -5706,7 +5711,7 @@ AVCodec ff_wmv3_vdpau_decoder = {
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.id = AV_CODEC_ID_WMV3,
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.priv_data_size = sizeof(VC1Context),
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.init = vc1_decode_init,
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.close = vc1_decode_end,
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.close = ff_vc1_decode_end,
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.decode = vc1_decode_frame,
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.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
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.long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),
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@ -5722,7 +5727,7 @@ AVCodec ff_vc1_vdpau_decoder = {
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.id = AV_CODEC_ID_VC1,
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.priv_data_size = sizeof(VC1Context),
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.init = vc1_decode_init,
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.close = vc1_decode_end,
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.close = ff_vc1_decode_end,
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.decode = vc1_decode_frame,
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.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
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.long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),
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@ -5738,7 +5743,7 @@ AVCodec ff_wmv3image_decoder = {
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.id = AV_CODEC_ID_WMV3IMAGE,
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.priv_data_size = sizeof(VC1Context),
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.init = vc1_decode_init,
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.close = vc1_decode_end,
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.close = ff_vc1_decode_end,
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.decode = vc1_decode_frame,
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.capabilities = CODEC_CAP_DR1,
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.flush = vc1_sprite_flush,
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@ -5754,7 +5759,7 @@ AVCodec ff_vc1image_decoder = {
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.id = AV_CODEC_ID_VC1IMAGE,
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.priv_data_size = sizeof(VC1Context),
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.init = vc1_decode_init,
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.close = vc1_decode_end,
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.close = ff_vc1_decode_end,
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.decode = vc1_decode_frame,
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.capabilities = CODEC_CAP_DR1,
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.flush = vc1_sprite_flush,
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