mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
eamad: remove use of MpegEncContext
There is no sense in pulling in this monster struct just for a handful of fields. The code does not call any functions expecting an MpegEncContext. Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard
parent
87cf481aa8
commit
591766a3a9
@ -42,12 +42,18 @@
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#define MADe_TAG MKTAG('M', 'A', 'D', 'e') /* MAD lqp-frame */
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typedef struct MadContext {
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MpegEncContext s;
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AVCodecContext *avctx;
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DSPContext dsp;
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AVFrame frame;
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AVFrame last_frame;
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GetBitContext gb;
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void *bitstream_buf;
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unsigned int bitstream_buf_size;
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DECLARE_ALIGNED(16, DCTELEM, block)[64];
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ScanTable scantable;
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uint16_t quant_matrix[64];
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int mb_x;
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int mb_y;
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} MadContext;
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static void bswap16_buf(uint16_t *dst, const uint16_t *src, int count)
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@ -59,14 +65,13 @@ static void bswap16_buf(uint16_t *dst, const uint16_t *src, int count)
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static av_cold int decode_init(AVCodecContext *avctx)
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{
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MadContext *t = avctx->priv_data;
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MpegEncContext *s = &t->s;
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MadContext *s = avctx->priv_data;
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s->avctx = avctx;
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avctx->pix_fmt = PIX_FMT_YUV420P;
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if (avctx->idct_algo == FF_IDCT_AUTO)
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avctx->idct_algo = FF_IDCT_EA;
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ff_dsputil_init(&s->dsp, avctx);
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ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
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ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
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ff_mpeg12_init_vlcs();
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return 0;
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}
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@ -83,13 +88,12 @@ static inline void comp(unsigned char *dst, int dst_stride,
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static inline void comp_block(MadContext *t, int mb_x, int mb_y,
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int j, int mv_x, int mv_y, int add)
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{
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MpegEncContext *s = &t->s;
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if (j < 4) {
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comp(t->frame.data[0] + (mb_y*16 + ((j&2)<<2))*t->frame.linesize[0] + mb_x*16 + ((j&1)<<3),
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t->frame.linesize[0],
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t->last_frame.data[0] + (mb_y*16 + ((j&2)<<2) + mv_y)*t->last_frame.linesize[0] + mb_x*16 + ((j&1)<<3) + mv_x,
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t->last_frame.linesize[0], add);
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} else if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
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} else if (!(t->avctx->flags & CODEC_FLAG_GRAY)) {
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int index = j - 3;
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comp(t->frame.data[index] + (mb_y*8)*t->frame.linesize[index] + mb_x * 8,
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t->frame.linesize[index],
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@ -100,26 +104,24 @@ static inline void comp_block(MadContext *t, int mb_x, int mb_y,
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static inline void idct_put(MadContext *t, DCTELEM *block, int mb_x, int mb_y, int j)
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{
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MpegEncContext *s = &t->s;
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if (j < 4) {
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s->dsp.idct_put(
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t->dsp.idct_put(
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t->frame.data[0] + (mb_y*16 + ((j&2)<<2))*t->frame.linesize[0] + mb_x*16 + ((j&1)<<3),
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t->frame.linesize[0], block);
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} else if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
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} else if (!(t->avctx->flags & CODEC_FLAG_GRAY)) {
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int index = j - 3;
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s->dsp.idct_put(
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t->dsp.idct_put(
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t->frame.data[index] + (mb_y*8)*t->frame.linesize[index] + mb_x*8,
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t->frame.linesize[index], block);
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}
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}
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static inline void decode_block_intra(MadContext * t, DCTELEM * block)
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static inline void decode_block_intra(MadContext *s, DCTELEM * block)
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{
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MpegEncContext *s = &t->s;
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int level, i, j, run;
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RLTable *rl = &ff_rl_mpeg1;
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const uint8_t *scantable = s->intra_scantable.permutated;
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int16_t *quant_matrix = s->intra_matrix;
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const uint8_t *scantable = s->scantable.permutated;
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int16_t *quant_matrix = s->quant_matrix;
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block[0] = (128 + get_sbits(&s->gb, 8)) * quant_matrix[0];
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@ -184,9 +186,8 @@ static int decode_motion(GetBitContext *gb)
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return value;
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}
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static void decode_mb(MadContext *t, int inter)
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static void decode_mb(MadContext *s, int inter)
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{
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MpegEncContext *s = &t->s;
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int mv_map = 0;
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int mv_x, mv_y;
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int j;
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@ -205,28 +206,27 @@ static void decode_mb(MadContext *t, int inter)
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for (j=0; j<6; j++) {
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if (mv_map & (1<<j)) { // mv_x and mv_y are guarded by mv_map
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int add = 2*decode_motion(&s->gb);
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comp_block(t, s->mb_x, s->mb_y, j, mv_x, mv_y, add);
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comp_block(s, s->mb_x, s->mb_y, j, mv_x, mv_y, add);
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} else {
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s->dsp.clear_block(t->block);
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decode_block_intra(t, t->block);
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idct_put(t, t->block, s->mb_x, s->mb_y, j);
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s->dsp.clear_block(s->block);
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decode_block_intra(s, s->block);
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idct_put(s, s->block, s->mb_x, s->mb_y, j);
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}
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}
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}
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static void calc_intra_matrix(MadContext *t, int qscale)
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static void calc_quant_matrix(MadContext *s, int qscale)
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{
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MpegEncContext *s = &t->s;
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int i;
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if (s->avctx->idct_algo == FF_IDCT_EA) {
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s->intra_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0]) >> 11;
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s->quant_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0]) >> 11;
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for (i=1; i<64; i++)
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s->intra_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32) >> 10;
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s->quant_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32) >> 10;
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} else {
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s->intra_matrix[0] = ff_mpeg1_default_intra_matrix[0];
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s->quant_matrix[0] = ff_mpeg1_default_intra_matrix[0];
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for (i=1; i<64; i++)
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s->intra_matrix[i] = (ff_mpeg1_default_intra_matrix[i]*qscale) << 1;
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s->quant_matrix[i] = (ff_mpeg1_default_intra_matrix[i]*qscale) << 1;
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}
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}
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@ -237,8 +237,8 @@ static int decode_frame(AVCodecContext *avctx,
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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const uint8_t *buf_end = buf+buf_size;
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MadContext *t = avctx->priv_data;
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MpegEncContext *s = &t->s;
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MadContext *s = avctx->priv_data;
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int width, height;
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int chunk_type;
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int inter;
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@ -255,42 +255,42 @@ static int decode_frame(AVCodecContext *avctx,
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av_reduce(&avctx->time_base.num, &avctx->time_base.den,
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AV_RL16(&buf[6]), 1000, 1<<30);
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s->width = AV_RL16(&buf[8]);
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s->height = AV_RL16(&buf[10]);
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calc_intra_matrix(t, buf[13]);
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width = AV_RL16(&buf[8]);
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height = AV_RL16(&buf[10]);
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calc_quant_matrix(s, buf[13]);
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buf += 16;
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if (avctx->width != s->width || avctx->height != s->height) {
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if (av_image_check_size(s->width, s->height, 0, avctx) < 0)
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if (avctx->width != width || avctx->height != height) {
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if (av_image_check_size(width, height, 0, avctx) < 0)
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return -1;
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avcodec_set_dimensions(avctx, s->width, s->height);
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if (t->frame.data[0])
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avctx->release_buffer(avctx, &t->frame);
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avcodec_set_dimensions(avctx, width, height);
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if (s->frame.data[0])
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avctx->release_buffer(avctx, &s->frame);
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}
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t->frame.reference = 1;
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if (!t->frame.data[0]) {
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if (avctx->get_buffer(avctx, &t->frame) < 0) {
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s->frame.reference = 1;
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if (!s->frame.data[0]) {
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if (avctx->get_buffer(avctx, &s->frame) < 0) {
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return -1;
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}
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}
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av_fast_malloc(&t->bitstream_buf, &t->bitstream_buf_size, (buf_end-buf) + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!t->bitstream_buf)
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av_fast_malloc(&s->bitstream_buf, &s->bitstream_buf_size, (buf_end-buf) + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!s->bitstream_buf)
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return AVERROR(ENOMEM);
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bswap16_buf(t->bitstream_buf, (const uint16_t*)buf, (buf_end-buf)/2);
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init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf));
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bswap16_buf(s->bitstream_buf, (const uint16_t*)buf, (buf_end-buf)/2);
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init_get_bits(&s->gb, s->bitstream_buf, 8*(buf_end-buf));
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for (s->mb_y=0; s->mb_y < (avctx->height+15)/16; s->mb_y++)
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for (s->mb_x=0; s->mb_x < (avctx->width +15)/16; s->mb_x++)
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decode_mb(t, inter);
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decode_mb(s, inter);
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*data_size = sizeof(AVFrame);
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*(AVFrame*)data = t->frame;
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*(AVFrame*)data = s->frame;
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if (chunk_type != MADe_TAG)
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FFSWAP(AVFrame, t->frame, t->last_frame);
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FFSWAP(AVFrame, s->frame, s->last_frame);
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return buf_size;
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}
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