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author | Kostya Shishkov <kostya.shishkov@gmail.com> | 2012-08-27 19:21:00 +0200 |
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committer | Kostya Shishkov <kostya.shishkov@gmail.com> | 2012-08-28 07:37:06 +0200 |
commit | 7627c35a81241c98768d2d1f13d576591cac0b1c (patch) | |
tree | 896f9964bf31b23c8dd80f03c7dcc84bd4be20ab /libavcodec | |
parent | ae43c4c0c09fee63bc7ec9385b3fd381be7ba1d5 (diff) | |
download | ffmpeg-streaming-7627c35a81241c98768d2d1f13d576591cac0b1c.zip ffmpeg-streaming-7627c35a81241c98768d2d1f13d576591cac0b1c.tar.gz |
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>
Diffstat (limited to 'libavcodec')
-rw-r--r-- | libavcodec/vc1.h | 5 | ||||
-rw-r--r-- | libavcodec/vc1dec.c | 51 |
2 files changed, 33 insertions, 23 deletions
diff --git a/libavcodec/vc1.h b/libavcodec/vc1.h index 5806b80..fe21f2f 100644 --- a/libavcodec/vc1.h +++ b/libavcodec/vc1.h @@ -451,4 +451,9 @@ int ff_vc1_parse_frame_header (VC1Context *v, GetBitContext *gb); int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext *gb); int ff_vc1_init_common(VC1Context *v); +av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v); +av_cold void ff_vc1_init_transposed_scantables(VC1Context *v); +av_cold int ff_vc1_decode_end(AVCodecContext *avctx); +void ff_vc1_decode_blocks(VC1Context *v); + #endif /* AVCODEC_VC1_H */ diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c index 7b0b8c9..63c0949 100644 --- a/libavcodec/vc1dec.c +++ b/libavcodec/vc1dec.c @@ -4732,7 +4732,7 @@ static void vc1_decode_skip_blocks(VC1Context *v) s->pict_type = AV_PICTURE_TYPE_P; } -static void vc1_decode_blocks(VC1Context *v) +void ff_vc1_decode_blocks(VC1Context *v) { v->s.esc3_level_length = 0; @@ -5046,7 +5046,7 @@ static void vc1_sprite_flush(AVCodecContext *avctx) #endif -static av_cold int vc1_decode_init_alloc_tables(VC1Context *v) +av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v) { MpegEncContext *s = &v->s; int i; @@ -5112,6 +5112,21 @@ static av_cold int vc1_decode_init_alloc_tables(VC1Context *v) return 0; } +av_cold void ff_vc1_init_transposed_scantables(VC1Context *v) +{ + int i; + for (i = 0; i < 64; i++) { +#define transpose(x) ((x >> 3) | ((x & 7) << 3)) + v->zz_8x8[0][i] = transpose(ff_wmv1_scantable[0][i]); + v->zz_8x8[1][i] = transpose(ff_wmv1_scantable[1][i]); + v->zz_8x8[2][i] = transpose(ff_wmv1_scantable[2][i]); + v->zz_8x8[3][i] = transpose(ff_wmv1_scantable[3][i]); + v->zzi_8x8[i] = transpose(ff_vc1_adv_interlaced_8x8_zz[i]); + } + v->left_blk_sh = 0; + v->top_blk_sh = 3; +} + /** Initialize a VC1/WMV3 decoder * @todo TODO: Handle VC-1 IDUs (Transport level?) * @todo TODO: Decypher remaining bits in extra_data @@ -5121,7 +5136,6 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx) VC1Context *v = avctx->priv_data; MpegEncContext *s = &v->s; GetBitContext gb; - int i; /* save the container output size for WMImage */ v->output_width = avctx->width; @@ -5224,16 +5238,7 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx) s->mb_height = (avctx->coded_height + 15) >> 4; if (v->profile == PROFILE_ADVANCED || v->res_fasttx) { - for (i = 0; i < 64; i++) { -#define transpose(x) ((x >> 3) | ((x & 7) << 3)) - v->zz_8x8[0][i] = transpose(ff_wmv1_scantable[0][i]); - v->zz_8x8[1][i] = transpose(ff_wmv1_scantable[1][i]); - v->zz_8x8[2][i] = transpose(ff_wmv1_scantable[2][i]); - v->zz_8x8[3][i] = transpose(ff_wmv1_scantable[3][i]); - v->zzi_8x8[i] = transpose(ff_vc1_adv_interlaced_8x8_zz[i]); - } - v->left_blk_sh = 0; - v->top_blk_sh = 3; + ff_vc1_init_transposed_scantables(v); } else { memcpy(v->zz_8x8, ff_wmv1_scantable, 4*64); v->left_blk_sh = 3; @@ -5259,7 +5264,7 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx) /** Close a VC1/WMV3 decoder * @warning Initial try at using MpegEncContext stuff */ -static av_cold int vc1_decode_end(AVCodecContext *avctx) +av_cold int ff_vc1_decode_end(AVCodecContext *avctx) { VC1Context *v = avctx->priv_data; int i; @@ -5448,11 +5453,11 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data, if (s->context_initialized && (s->width != avctx->coded_width || s->height != avctx->coded_height)) { - vc1_decode_end(avctx); + ff_vc1_decode_end(avctx); } if (!s->context_initialized) { - if (ff_msmpeg4_decode_init(avctx) < 0 || vc1_decode_init_alloc_tables(v) < 0) + if (ff_msmpeg4_decode_init(avctx) < 0 || ff_vc1_decode_init_alloc_tables(v) < 0) return -1; s->low_delay = !avctx->has_b_frames || v->res_sprite; @@ -5597,7 +5602,7 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data, s->end_mb_y = (i == n_slices ) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height); else s->end_mb_y = (i <= n_slices1 + 1) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height); - vc1_decode_blocks(v); + ff_vc1_decode_blocks(v); if (i != n_slices) s->gb = slices[i].gb; } @@ -5675,7 +5680,7 @@ AVCodec ff_vc1_decoder = { .id = AV_CODEC_ID_VC1, .priv_data_size = sizeof(VC1Context), .init = vc1_decode_init, - .close = vc1_decode_end, + .close = ff_vc1_decode_end, .decode = vc1_decode_frame, .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY, .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"), @@ -5690,7 +5695,7 @@ AVCodec ff_wmv3_decoder = { .id = AV_CODEC_ID_WMV3, .priv_data_size = sizeof(VC1Context), .init = vc1_decode_init, - .close = vc1_decode_end, + .close = ff_vc1_decode_end, .decode = vc1_decode_frame, .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY, .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"), @@ -5706,7 +5711,7 @@ AVCodec ff_wmv3_vdpau_decoder = { .id = AV_CODEC_ID_WMV3, .priv_data_size = sizeof(VC1Context), .init = vc1_decode_init, - .close = vc1_decode_end, + .close = ff_vc1_decode_end, .decode = vc1_decode_frame, .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU, .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"), @@ -5722,7 +5727,7 @@ AVCodec ff_vc1_vdpau_decoder = { .id = AV_CODEC_ID_VC1, .priv_data_size = sizeof(VC1Context), .init = vc1_decode_init, - .close = vc1_decode_end, + .close = ff_vc1_decode_end, .decode = vc1_decode_frame, .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU, .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"), @@ -5738,7 +5743,7 @@ AVCodec ff_wmv3image_decoder = { .id = AV_CODEC_ID_WMV3IMAGE, .priv_data_size = sizeof(VC1Context), .init = vc1_decode_init, - .close = vc1_decode_end, + .close = ff_vc1_decode_end, .decode = vc1_decode_frame, .capabilities = CODEC_CAP_DR1, .flush = vc1_sprite_flush, @@ -5754,7 +5759,7 @@ AVCodec ff_vc1image_decoder = { .id = AV_CODEC_ID_VC1IMAGE, .priv_data_size = sizeof(VC1Context), .init = vc1_decode_init, - .close = vc1_decode_end, + .close = ff_vc1_decode_end, .decode = vc1_decode_frame, .capabilities = CODEC_CAP_DR1, .flush = vc1_sprite_flush, |