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add a new vp6a codec (add alpha plan support to vp6)

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Originally committed as revision 10574 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs 2007-09-25 19:12:46 +00:00
parent 58f66029b6
commit 91fc2cf150
8 changed files with 87 additions and 33 deletions
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1
libavcodec/allcodecs.c
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@ -156,6 +156,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (VP3, vp3);
REGISTER_DECODER (VP5, vp5);
REGISTER_DECODER (VP6, vp6);
REGISTER_DECODER (VP6A, vp6a);
REGISTER_DECODER (VP6F, vp6f);
REGISTER_DECODER (VQA, vqa);
REGISTER_ENCDEC (WMV1, wmv1);

1
libavcodec/avcodec.h
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@ -166,6 +166,7 @@ enum CodecID {
CODEC_ID_BETHSOFTVID,
CODEC_ID_PTX,
CODEC_ID_TXD,
CODEC_ID_VP6A,
/* various PCM "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,

2
libavcodec/vp5.c
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@ -270,7 +270,7 @@ static int vp5_decode_init(AVCodecContext *avctx)
{
vp56_context_t *s = avctx->priv_data;
vp56_init(avctx, 1);
vp56_init(avctx, 1, 0);
s->vp56_coord_div = vp5_coord_div;
s->parse_vector_adjustment = vp5_parse_vector_adjustment;
s->adjust = vp5_adjust;

78
libavcodec/vp56.c
View File

@ -22,6 +22,7 @@
*/
#include "avcodec.h"
#include "bytestream.h"
#include "vp56.h"
#include "vp56data.h"
@ -394,12 +395,12 @@ static void vp56_mc(vp56_context_t *s, int b, int plane, uint8_t *src,
}
}
static void vp56_decode_mb(vp56_context_t *s, int row, int col)
static void vp56_decode_mb(vp56_context_t *s, int row, int col, int is_alpha)
{
AVFrame *frame_current, *frame_ref;
vp56_mb_t mb_type;
vp56_frame_t ref_frame;
int b, plan, off;
int b, ab, b_max, plan, off;
if (s->framep[VP56_FRAME_CURRENT]->key_frame)
mb_type = VP56_MB_INTRA;
@ -416,10 +417,13 @@ static void vp56_decode_mb(vp56_context_t *s, int row, int col)
frame_current = s->framep[VP56_FRAME_CURRENT];
frame_ref = s->framep[ref_frame];
ab = 6*is_alpha;
b_max = 6 - 2*is_alpha;
switch (mb_type) {
case VP56_MB_INTRA:
for (b=0; b<6; b++) {
plan = vp56_b2p[b];
for (b=0; b<b_max; b++) {
plan = vp56_b2p[b+ab];
s->dsp.idct_put(frame_current->data[plan] + s->block_offset[b],
s->stride[plan], s->block_coeff[b]);
}
@ -427,8 +431,8 @@ static void vp56_decode_mb(vp56_context_t *s, int row, int col)
case VP56_MB_INTER_NOVEC_PF:
case VP56_MB_INTER_NOVEC_GF:
for (b=0; b<6; b++) {
plan = vp56_b2p[b];
for (b=0; b<b_max; b++) {
plan = vp56_b2p[b+ab];
off = s->block_offset[b];
s->dsp.put_pixels_tab[1][0](frame_current->data[plan] + off,
frame_ref->data[plan] + off,
@ -445,10 +449,10 @@ static void vp56_decode_mb(vp56_context_t *s, int row, int col)
case VP56_MB_INTER_4V:
case VP56_MB_INTER_V1_GF:
case VP56_MB_INTER_V2_GF:
for (b=0; b<6; b++) {
for (b=0; b<b_max; b++) {
int x_off = b==1 || b==3 ? 8 : 0;
int y_off = b==2 || b==3 ? 8 : 0;
plan = vp56_b2p[b];
plan = vp56_b2p[b+ab];
vp56_mc(s, b, plan, frame_ref->data[plan], s->stride[plan],
16*col+x_off, 16*row+y_off);
s->dsp.idct_add(frame_current->data[plan] + s->block_offset[b],
@ -464,12 +468,12 @@ static int vp56_size_changed(AVCodecContext *avctx)
int stride = s->framep[VP56_FRAME_CURRENT]->linesize[0];
int i;
s->plane_width[0] = avctx->coded_width;
s->plane_width[0] = s->plane_width[3] = avctx->coded_width;
s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2;
s->plane_height[0] = avctx->coded_height;
s->plane_height[0] = s->plane_height[3] = avctx->coded_height;
s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2;
for (i=0; i<3; i++)
for (i=0; i<4; i++)
s->stride[i] = s->flip * s->framep[VP56_FRAME_CURRENT]->linesize[i];
s->mb_width = (avctx->coded_width +15) / 16;
@ -498,17 +502,26 @@ int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
{
vp56_context_t *s = avctx->priv_data;
AVFrame *const p = s->framep[VP56_FRAME_CURRENT];
int is_alpha, alpha_offset;
if (s->has_alpha) {
alpha_offset = bytestream_get_be24(&buf);
buf_size -= 3;
}
for (is_alpha=0; is_alpha < 1+s->has_alpha; is_alpha++) {
int mb_row, mb_col, mb_row_flip, mb_offset = 0;
int block, y, uv, stride_y, stride_uv;
int golden_frame = 0;
int res;
s->modelp = &s->models;
s->modelp = &s->models[is_alpha];
res = s->parse_header(s, buf, buf_size, &golden_frame);
if (!res)
return -1;
if (!is_alpha) {
p->reference = 1;
if (avctx->get_buffer(avctx, p) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
@ -520,6 +533,7 @@ int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
avctx->release_buffer(avctx, p);
return -1;
}
}
if (p->key_frame) {
p->pict_type = FF_I_TYPE;
@ -583,7 +597,7 @@ int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
s->block_offset[5] = s->block_offset[4];
for (mb_col=0; mb_col<s->mb_width; mb_col++) {
vp56_decode_mb(s, mb_row, mb_col);
vp56_decode_mb(s, mb_row, mb_col, is_alpha);
for (y=0; y<4; y++) {
s->above_block_idx[y] += 2;
@ -597,16 +611,32 @@ int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
}
}
if (s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN])
FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS],
s->framep[VP56_FRAME_UNUSED]);
else if (s->framep[VP56_FRAME_PREVIOUS]->data[0])
avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]);
if (p->key_frame || golden_frame) {
if (s->framep[VP56_FRAME_GOLDEN]->data[0])
if (s->framep[VP56_FRAME_GOLDEN]->data[0] &&
s->framep[VP56_FRAME_GOLDEN] != s->framep[VP56_FRAME_GOLDEN2])
avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]);
s->framep[VP56_FRAME_GOLDEN] = p;
}
if (s->has_alpha) {
FFSWAP(AVFrame *, s->framep[VP56_FRAME_GOLDEN],
s->framep[VP56_FRAME_GOLDEN2]);
buf += alpha_offset;
buf_size -= alpha_offset;
}
}
if (s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN] ||
s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN2]) {
if (s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN] &&
s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN2])
FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS],
s->framep[VP56_FRAME_UNUSED]);
else
FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS],
s->framep[VP56_FRAME_UNUSED2]);
} else if (s->framep[VP56_FRAME_PREVIOUS]->data[0])
avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]);
FFSWAP(AVFrame *, s->framep[VP56_FRAME_CURRENT],
s->framep[VP56_FRAME_PREVIOUS]);
@ -616,13 +646,13 @@ int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
return buf_size;
}
void vp56_init(AVCodecContext *avctx, int flip)
void vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
{
vp56_context_t *s = avctx->priv_data;
int i;
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_YUV420P;
avctx->pix_fmt = has_alpha ? PIX_FMT_YUVA420P : PIX_FMT_YUV420P;
if (avctx->idct_algo == FF_IDCT_AUTO)
avctx->idct_algo = FF_IDCT_VP3;
@ -631,9 +661,10 @@ void vp56_init(AVCodecContext *avctx, int flip)
avcodec_set_dimensions(avctx, 0, 0);
for (i=0; i<3; i++)
for (i=0; i<4; i++)
s->framep[i] = &s->frames[i];
s->framep[VP56_FRAME_UNUSED] = s->framep[VP56_FRAME_GOLDEN];
s->framep[VP56_FRAME_UNUSED2] = s->framep[VP56_FRAME_GOLDEN2];
s->edge_emu_buffer_alloc = NULL;
s->above_blocks = NULL;
@ -643,6 +674,7 @@ void vp56_init(AVCodecContext *avctx, int flip)
s->filter = NULL;
s->has_alpha = has_alpha;
if (flip) {
s->flip = -1;
s->frbi = 2;
@ -663,6 +695,8 @@ int vp56_free(AVCodecContext *avctx)
av_free(s->edge_emu_buffer_alloc);
if (s->framep[VP56_FRAME_GOLDEN]->data[0])
avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]);
if (s->framep[VP56_FRAME_GOLDEN2]->data[0])
avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN2]);
if (s->framep[VP56_FRAME_PREVIOUS]->data[0])
avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]);
return 0;

16
libavcodec/vp56.h
View File

@ -90,8 +90,8 @@ struct vp56_context {
AVCodecContext *avctx;
DSPContext dsp;
ScanTable scantable;
AVFrame frames[3];
AVFrame *framep[4];
AVFrame frames[4];
AVFrame *framep[6];
uint8_t *edge_emu_buffer_alloc;
uint8_t *edge_emu_buffer;
vp56_range_coder_t c;
@ -100,8 +100,8 @@ struct vp56_context {
int sub_version;
/* frame info */
int plane_width[3];
int plane_height[3];
int plane_width[4];
int plane_height[4];
int mb_width; /* number of horizontal MB */
int mb_height; /* number of vertical MB */
int block_offset[6];
@ -137,11 +137,13 @@ struct vp56_context {
uint8_t coeff_ctx[4][64]; /* used in vp5 only */
uint8_t coeff_ctx_last[4]; /* used in vp5 only */
int has_alpha;
/* upside-down flipping hints */
int flip; /* are we flipping ? */
int frbi; /* first row block index in MB */
int srbi; /* second row block index in MB */
int stride[3]; /* stride for each plan */
int stride[4]; /* stride for each plan */
const uint8_t *vp56_coord_div;
vp56_parse_vector_adjustment_t parse_vector_adjustment;
@ -154,11 +156,11 @@ struct vp56_context {
vp56_parse_header_t parse_header;
vp56_model_t *modelp;
vp56_model_t models;
vp56_model_t models[2];
};
void vp56_init(AVCodecContext *avctx, int flip);
void vp56_init(AVCodecContext *avctx, int flip, int has_alpha);
int vp56_free(AVCodecContext *avctx);
void vp56_init_dequant(vp56_context_t *s, int quantizer);
int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,

2
libavcodec/vp56data.c
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@ -23,7 +23,7 @@
#include "vp56data.h"
const uint8_t vp56_b2p[] = { 0, 0, 0, 0, 1, 2 };
const uint8_t vp56_b2p[] = { 0, 0, 0, 0, 1, 2, 3, 3, 3, 3 };
const uint8_t vp56_b6to4[] = { 0, 0, 1, 1, 2, 3 };
const uint8_t vp56_coeff_parse_table[6][11] = {

4
libavcodec/vp56data.h
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@ -30,7 +30,9 @@ typedef enum {
VP56_FRAME_CURRENT = 0,
VP56_FRAME_PREVIOUS = 1,
VP56_FRAME_GOLDEN = 2,
VP56_FRAME_UNUSED = 3,
VP56_FRAME_GOLDEN2 = 3,
VP56_FRAME_UNUSED = 4,
VP56_FRAME_UNUSED2 = 5,
} vp56_frame_t;
typedef enum {

16
libavcodec/vp6.c
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@ -494,7 +494,8 @@ static int vp6_decode_init(AVCodecContext *avctx)
{
vp56_context_t *s = avctx->priv_data;
vp56_init(avctx, avctx->codec->id == CODEC_ID_VP6);
vp56_init(avctx, avctx->codec->id == CODEC_ID_VP6,
avctx->codec->id == CODEC_ID_VP6A);
s->vp56_coord_div = vp6_coord_div;
s->parse_vector_adjustment = vp6_parse_vector_adjustment;
s->adjust = vp6_adjust;
@ -532,3 +533,16 @@ AVCodec vp6f_decoder = {
vp56_decode_frame,
CODEC_CAP_DR1,
};
/* flash version, not flipped upside-down, with alpha channel */
AVCodec vp6a_decoder = {
"vp6a",
CODEC_TYPE_VIDEO,
CODEC_ID_VP6A,
sizeof(vp56_context_t),
vp6_decode_init,
NULL,
vp56_free,
vp56_decode_frame,
CODEC_CAP_DR1,
};