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AMV video encoder.

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Authors are Vladimir Voroshilov and Dobrica Pavlinušić based on svn blame/log
For full details of authorship see http://code.google.com/p/amv-codec-tools/

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-09-25 02:54:20 +02:00
parent ccecab4a0d
commit f2f28861da
4 changed files with 48 additions and 1 deletions
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2
libavcodec/allcodecs.c
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@ -71,7 +71,7 @@ void avcodec_register_all(void)
REGISTER_ENCODER (A64MULTI, a64multi);
REGISTER_ENCODER (A64MULTI5, a64multi5);
REGISTER_DECODER (AASC, aasc);
REGISTER_DECODER (AMV, amv);
REGISTER_ENCDEC (AMV, amv);
REGISTER_DECODER (ANM, anm);
REGISTER_DECODER (ANSI, ansi);
REGISTER_ENCDEC (ASV1, asv1);

36
libavcodec/mjpegenc.c
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@ -200,6 +200,9 @@ void ff_mjpeg_encode_picture_header(MpegEncContext *s)
put_marker(&s->pb, SOI);
// hack for AMV mjpeg format
if(s->avctx->codec_id == CODEC_ID_AMV) return;
jpeg_put_comments(s);
jpeg_table_header(s);
@ -445,6 +448,28 @@ void ff_mjpeg_encode_mb(MpegEncContext *s, DCTELEM block[6][64])
s->i_tex_bits += get_bits_diff(s);
}
// maximum over s->mjpeg_vsample[i]
#define V_MAX 2
static int amv_encode_picture(AVCodecContext *avctx,
unsigned char *buf, int buf_size, void *data)
{
AVFrame* pic=data;
MpegEncContext *s = avctx->priv_data;
int i;
//CODEC_FLAG_EMU_EDGE have to be cleared
if(s->avctx->flags & CODEC_FLAG_EMU_EDGE)
return -1;
//picture should be flipped upside-down
for(i=0; i < 3; i++) {
pic->data[i] += (pic->linesize[i] * (s->mjpeg_vsample[i] * (8 * s->mb_height -((s->height/V_MAX)&7)) - 1 ));
pic->linesize[i] *= -1;
}
return MPV_encode_picture(avctx,buf, buf_size, pic);
}
AVCodec ff_mjpeg_encoder = {
.name = "mjpeg",
.type = AVMEDIA_TYPE_VIDEO,
@ -456,3 +481,14 @@ AVCodec ff_mjpeg_encoder = {
.pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_NONE},
.long_name= NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
};
AVCodec ff_amv_encoder = {
"amv",
AVMEDIA_TYPE_VIDEO,
CODEC_ID_AMV,
sizeof(MpegEncContext),
MPV_encode_init,
amv_encode_picture,
MPV_encode_end,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, -1},
};

10
libavcodec/mpegvideo_enc.c
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@ -265,6 +265,7 @@ av_cold int MPV_encode_init(AVCodecContext *avctx)
}
break;
case CODEC_ID_MJPEG:
case CODEC_ID_AMV:
if(avctx->pix_fmt != PIX_FMT_YUVJ420P && avctx->pix_fmt != PIX_FMT_YUVJ422P &&
((avctx->pix_fmt != PIX_FMT_YUV420P && avctx->pix_fmt != PIX_FMT_YUV422P) || avctx->strict_std_compliance>FF_COMPLIANCE_UNOFFICIAL)){
av_log(avctx, AV_LOG_ERROR, "colorspace not supported in jpeg\n");
@ -530,6 +531,11 @@ av_cold int MPV_encode_init(AVCodecContext *avctx)
if(s->mpeg_quant || s->codec_id==CODEC_ID_MPEG1VIDEO || s->codec_id==CODEC_ID_MPEG2VIDEO || s->codec_id==CODEC_ID_MJPEG){
s->intra_quant_bias= 3<<(QUANT_BIAS_SHIFT-3); //(a + x*3/8)/x
s->inter_quant_bias= 0;
}else if(s->codec_id==CODEC_ID_AMV){
s->intra_quant_bias= 0;
s->inter_quant_bias= 0;
s->fixed_qscale = 1;
s->adaptive_quant = 0;
}else{
s->intra_quant_bias=0;
s->inter_quant_bias=-(1<<(QUANT_BIAS_SHIFT-2)); //(a - x/4)/x
@ -540,6 +546,8 @@ av_cold int MPV_encode_init(AVCodecContext *avctx)
if(avctx->inter_quant_bias != FF_DEFAULT_QUANT_BIAS)
s->inter_quant_bias= avctx->inter_quant_bias;
av_log(avctx, AV_LOG_DEBUG, "intra_quant_bias = %d inter_quant_bias = %d\n",s->intra_quant_bias,s->inter_quant_bias);
avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, &chroma_v_shift);
if(avctx->codec_id == CODEC_ID_MPEG4 && s->avctx->time_base.den > (1<<16)-1){
@ -564,6 +572,7 @@ av_cold int MPV_encode_init(AVCodecContext *avctx)
break;
case CODEC_ID_LJPEG:
case CODEC_ID_MJPEG:
case CODEC_ID_AMV:
s->out_format = FMT_MJPEG;
s->intra_only = 1; /* force intra only for jpeg */
if(avctx->codec->id == CODEC_ID_LJPEG && avctx->pix_fmt == PIX_FMT_BGRA){
@ -1788,6 +1797,7 @@ static av_always_inline void encode_mb_internal(MpegEncContext *s, int motion_x,
h263_encode_mb(s, s->block, motion_x, motion_y);
break;
case CODEC_ID_MJPEG:
case CODEC_ID_AMV:
if (CONFIG_MJPEG_ENCODER)
ff_mjpeg_encode_mb(s, s->block);
break;

1
libavformat/riff.c
View File

@ -276,6 +276,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
{ CODEC_ID_G2M, MKTAG('G', '2', 'M', '2') },
{ CODEC_ID_G2M, MKTAG('G', '2', 'M', '3') },
{ CODEC_ID_G2M, MKTAG('G', '2', 'M', '4') },
{ CODEC_ID_AMV, MKTAG('A', 'M', 'V', 'F') },
{ CODEC_ID_NONE, 0 }
};