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ppsspp/ext/ffmpeg/libavcodec/h264_mb_template.c
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Henrik RydgårdandClaude Opus 5.5 d0e3141f43 FFmpeg: Vendor what PPSSPP uses into ext/ffmpeg, drop the submodule 
The ffmpeg submodule held prebuilt libraries for every platform next to the
sources (about 1.5 GB checked out), and nothing uses those any more. Only the
needed sources are copied in, from the submodule's commit, along with every
header and template they include. The path is new, so checking out commits on
either side of this works.

It's also cut down to what PPSSPP uses: the H.264, AAC, MP3, ATRAC3 and ATRAC3+
decoders, the H.264 parser, the demuxers as before, and the FFV1 encoder, AVI
muxer and file protocol for AVI dumping. config.h takes its CONFIG_ values from
FFmpeg 3.0.2's own configure run with just those enabled. The raw H.264 demuxer
stays even though nothing opens raw H.264: probing PSMF data uses it to identify
the video stream's codec, which otherwise comes out as none.

On top of that:
- The files nothing links (configure would build them, but they're never pulled
  out of the static library, going by the GCC link map) are left out: mostly
  libavutil's crypto and hashing and the alternative DCT/IDCT/FFT versions.
- libswresample isn't built, now that nothing uses it.
- The H.264 decoder only does 8-bit video, which is all the PSP has. The SPS
  parser rejects any other bit depth, and the DSP files no longer build their 9-
  to 16-bit variants, which the linker kept because the init functions pick one
  by bit depth at run time.

That's 160 files to compile instead of 277, and 391 of FFmpeg's vendored, about
5.8 MB. The README in ext/ffmpeg has what was done, the PPSSPP patches in the
copy, how to add a component, and the tradeoffs.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
2026-10-25 22:27:54 +01:00

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/*
* H.26L/H.264/AVC/JVT/14496-10/... decoder
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "svq3.h"
#undef FUNC
#undef PIXEL_SHIFT
#if SIMPLE
# define FUNC(n) AV_JOIN(n ## _simple_, BITS)
# define PIXEL_SHIFT (BITS >> 4)
#else
# define FUNC(n) n ## _complex
# define PIXEL_SHIFT h->pixel_shift
#endif
#undef CHROMA_IDC
#define CHROMA_IDC 1
#include "h264_mc_template.c"
#undef CHROMA_IDC
#define CHROMA_IDC 2
#include "h264_mc_template.c"
static av_noinline void FUNC(hl_decode_mb)(const H264Context *h, H264SliceContext *sl)
{
const int mb_x = sl->mb_x;
const int mb_y = sl->mb_y;
const int mb_xy = sl->mb_xy;
const int mb_type = h->cur_pic.mb_type[mb_xy];
uint8_t *dest_y, *dest_cb, *dest_cr;
int linesize, uvlinesize /*dct_offset*/;
int i, j;
const int *block_offset = &h->block_offset[0];
const int transform_bypass = !SIMPLE && (sl->qscale == 0 && h->sps.transform_bypass);
/* is_h264 should always be true if SVQ3 is disabled. */
const int is_h264 = !CONFIG_SVQ3_DECODER || SIMPLE || h->avctx->codec_id == AV_CODEC_ID_H264;
void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
const int block_h = 16 >> h->chroma_y_shift;
const int chroma422 = CHROMA422(h);
dest_y = h->cur_pic.f->data[0] + ((mb_x << PIXEL_SHIFT) + mb_y * sl->linesize) * 16;
dest_cb = h->cur_pic.f->data[1] + (mb_x << PIXEL_SHIFT) * 8 + mb_y * sl->uvlinesize * block_h;
dest_cr = h->cur_pic.f->data[2] + (mb_x << PIXEL_SHIFT) * 8 + mb_y * sl->uvlinesize * block_h;
h->vdsp.prefetch(dest_y + (sl->mb_x & 3) * 4 * sl->linesize + (64 << PIXEL_SHIFT), sl->linesize, 4);
h->vdsp.prefetch(dest_cb + (sl->mb_x & 7) * sl->uvlinesize + (64 << PIXEL_SHIFT), dest_cr - dest_cb, 2);
h->list_counts[mb_xy] = sl->list_count;
if (!SIMPLE && MB_FIELD(sl)) {
linesize = sl->mb_linesize = sl->linesize * 2;
uvlinesize = sl->mb_uvlinesize = sl->uvlinesize * 2;
block_offset = &h->block_offset[48];
if (mb_y & 1) { // FIXME move out of this function?
dest_y -= sl->linesize * 15;
dest_cb -= sl->uvlinesize * (block_h - 1);
dest_cr -= sl->uvlinesize * (block_h - 1);
}
if (FRAME_MBAFF(h)) {
int list;
for (list = 0; list < sl->list_count; list++) {
if (!USES_LIST(mb_type, list))
continue;
if (IS_16X16(mb_type)) {
int8_t *ref = &sl->ref_cache[list][scan8[0]];
fill_rectangle(ref, 4, 4, 8, (16 + *ref) ^ (sl->mb_y & 1), 1);
} else {
for (i = 0; i < 16; i += 4) {
int ref = sl->ref_cache[list][scan8[i]];
if (ref >= 0)
fill_rectangle(&sl->ref_cache[list][scan8[i]], 2, 2,
8, (16 + ref) ^ (sl->mb_y & 1), 1);
}
}
}
}
} else {
linesize = sl->mb_linesize = sl->linesize;
uvlinesize = sl->mb_uvlinesize = sl->uvlinesize;
// dct_offset = s->linesize * 16;
}
if (!SIMPLE && IS_INTRA_PCM(mb_type)) {
const int bit_depth = h->sps.bit_depth_luma;
if (PIXEL_SHIFT) {
int j;
GetBitContext gb;
init_get_bits(&gb, sl->intra_pcm_ptr,
ff_h264_mb_sizes[h->sps.chroma_format_idc] * bit_depth);
for (i = 0; i < 16; i++) {
uint16_t *tmp_y = (uint16_t *)(dest_y + i * linesize);
for (j = 0; j < 16; j++)
tmp_y[j] = get_bits(&gb, bit_depth);
}
if (SIMPLE || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
if (!h->sps.chroma_format_idc) {
for (i = 0; i < block_h; i++) {
uint16_t *tmp_cb = (uint16_t *)(dest_cb + i * uvlinesize);
uint16_t *tmp_cr = (uint16_t *)(dest_cr + i * uvlinesize);
for (j = 0; j < 8; j++) {
tmp_cb[j] = tmp_cr[j] = 1 << (bit_depth - 1);
}
}
} else {
for (i = 0; i < block_h; i++) {
uint16_t *tmp_cb = (uint16_t *)(dest_cb + i * uvlinesize);
for (j = 0; j < 8; j++)
tmp_cb[j] = get_bits(&gb, bit_depth);
}
for (i = 0; i < block_h; i++) {
uint16_t *tmp_cr = (uint16_t *)(dest_cr + i * uvlinesize);
for (j = 0; j < 8; j++)
tmp_cr[j] = get_bits(&gb, bit_depth);
}
}
}
} else {
for (i = 0; i < 16; i++)
memcpy(dest_y + i * linesize, sl->intra_pcm_ptr + i * 16, 16);
if (SIMPLE || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
if (!h->sps.chroma_format_idc) {
for (i = 0; i < 8; i++) {
memset(dest_cb + i * uvlinesize, 1 << (bit_depth - 1), 8);
memset(dest_cr + i * uvlinesize, 1 << (bit_depth - 1), 8);
}
} else {
const uint8_t *src_cb = sl->intra_pcm_ptr + 256;
const uint8_t *src_cr = sl->intra_pcm_ptr + 256 + block_h * 8;
for (i = 0; i < block_h; i++) {
memcpy(dest_cb + i * uvlinesize, src_cb + i * 8, 8);
memcpy(dest_cr + i * uvlinesize, src_cr + i * 8, 8);
}
}
}
}
} else {
if (IS_INTRA(mb_type)) {
if (sl->deblocking_filter)
xchg_mb_border(h, sl, dest_y, dest_cb, dest_cr, linesize,
uvlinesize, 1, 0, SIMPLE, PIXEL_SHIFT);
if (SIMPLE || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
h->hpc.pred8x8[sl->chroma_pred_mode](dest_cb, uvlinesize);
h->hpc.pred8x8[sl->chroma_pred_mode](dest_cr, uvlinesize);
}
hl_decode_mb_predict_luma(h, sl, mb_type, is_h264, SIMPLE,
transform_bypass, PIXEL_SHIFT,
block_offset, linesize, dest_y, 0);
if (sl->deblocking_filter)
xchg_mb_border(h, sl, dest_y, dest_cb, dest_cr, linesize,
uvlinesize, 0, 0, SIMPLE, PIXEL_SHIFT);
} else if (is_h264) {
if (chroma422) {
FUNC(hl_motion_422)(h, sl, dest_y, dest_cb, dest_cr,
h->qpel_put, h->h264chroma.put_h264_chroma_pixels_tab,
h->qpel_avg, h->h264chroma.avg_h264_chroma_pixels_tab,
h->h264dsp.weight_h264_pixels_tab,
h->h264dsp.biweight_h264_pixels_tab);
} else {
FUNC(hl_motion_420)(h, sl, dest_y, dest_cb, dest_cr,
h->qpel_put, h->h264chroma.put_h264_chroma_pixels_tab,
h->qpel_avg, h->h264chroma.avg_h264_chroma_pixels_tab,
h->h264dsp.weight_h264_pixels_tab,
h->h264dsp.biweight_h264_pixels_tab);
}
}
hl_decode_mb_idct_luma(h, sl, mb_type, is_h264, SIMPLE, transform_bypass,
PIXEL_SHIFT, block_offset, linesize, dest_y, 0);
if ((SIMPLE || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) &&
(sl->cbp & 0x30)) {
uint8_t *dest[2] = { dest_cb, dest_cr };
if (transform_bypass) {
if (IS_INTRA(mb_type) && h->sps.profile_idc == 244 &&
(sl->chroma_pred_mode == VERT_PRED8x8 ||
sl->chroma_pred_mode == HOR_PRED8x8)) {
h->hpc.pred8x8_add[sl->chroma_pred_mode](dest[0],
block_offset + 16,
sl->mb + (16 * 16 * 1 << PIXEL_SHIFT),
uvlinesize);
h->hpc.pred8x8_add[sl->chroma_pred_mode](dest[1],
block_offset + 32,
sl->mb + (16 * 16 * 2 << PIXEL_SHIFT),
uvlinesize);
} else {
idct_add = h->h264dsp.h264_add_pixels4_clear;
for (j = 1; j < 3; j++) {
for (i = j * 16; i < j * 16 + 4; i++)
if (sl->non_zero_count_cache[scan8[i]] ||
dctcoef_get(sl->mb, PIXEL_SHIFT, i * 16))
idct_add(dest[j - 1] + block_offset[i],
sl->mb + (i * 16 << PIXEL_SHIFT),
uvlinesize);
if (chroma422) {
for (i = j * 16 + 4; i < j * 16 + 8; i++)
if (sl->non_zero_count_cache[scan8[i + 4]] ||
dctcoef_get(sl->mb, PIXEL_SHIFT, i * 16))
idct_add(dest[j - 1] + block_offset[i + 4],
sl->mb + (i * 16 << PIXEL_SHIFT),
uvlinesize);
}
}
}
} else {
if (is_h264) {
int qp[2];
if (chroma422) {
qp[0] = sl->chroma_qp[0] + 3;
qp[1] = sl->chroma_qp[1] + 3;
} else {
qp[0] = sl->chroma_qp[0];
qp[1] = sl->chroma_qp[1];
}
if (sl->non_zero_count_cache[scan8[CHROMA_DC_BLOCK_INDEX + 0]])
h->h264dsp.h264_chroma_dc_dequant_idct(sl->mb + (16 * 16 * 1 << PIXEL_SHIFT),
h->dequant4_coeff[IS_INTRA(mb_type) ? 1 : 4][qp[0]][0]);
if (sl->non_zero_count_cache[scan8[CHROMA_DC_BLOCK_INDEX + 1]])
h->h264dsp.h264_chroma_dc_dequant_idct(sl->mb + (16 * 16 * 2 << PIXEL_SHIFT),
h->dequant4_coeff[IS_INTRA(mb_type) ? 2 : 5][qp[1]][0]);
h->h264dsp.h264_idct_add8(dest, block_offset,
sl->mb, uvlinesize,
sl->non_zero_count_cache);
} else if (CONFIG_SVQ3_DECODER) {
h->h264dsp.h264_chroma_dc_dequant_idct(sl->mb + 16 * 16 * 1,
h->dequant4_coeff[IS_INTRA(mb_type) ? 1 : 4][sl->chroma_qp[0]][0]);
h->h264dsp.h264_chroma_dc_dequant_idct(sl->mb + 16 * 16 * 2,
h->dequant4_coeff[IS_INTRA(mb_type) ? 2 : 5][sl->chroma_qp[1]][0]);
for (j = 1; j < 3; j++) {
for (i = j * 16; i < j * 16 + 4; i++)
if (sl->non_zero_count_cache[scan8[i]] || sl->mb[i * 16]) {
uint8_t *const ptr = dest[j - 1] + block_offset[i];
ff_svq3_add_idct_c(ptr, sl->mb + i * 16,
uvlinesize,
ff_h264_chroma_qp[0][sl->qscale + 12] - 12, 2);
}
}
}
}
}
}
}
#if !SIMPLE || BITS == 8
#undef CHROMA_IDC
#define CHROMA_IDC 3
#include "h264_mc_template.c"
static av_noinline void FUNC(hl_decode_mb_444)(const H264Context *h, H264SliceContext *sl)
{
const int mb_x = sl->mb_x;
const int mb_y = sl->mb_y;
const int mb_xy = sl->mb_xy;
const int mb_type = h->cur_pic.mb_type[mb_xy];
uint8_t *dest[3];
int linesize;
int i, j, p;
const int *block_offset = &h->block_offset[0];
const int transform_bypass = !SIMPLE && (sl->qscale == 0 && h->sps.transform_bypass);
const int plane_count = (SIMPLE || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) ? 3 : 1;
for (p = 0; p < plane_count; p++) {
dest[p] = h->cur_pic.f->data[p] +
((mb_x << PIXEL_SHIFT) + mb_y * sl->linesize) * 16;
h->vdsp.prefetch(dest[p] + (sl->mb_x & 3) * 4 * sl->linesize + (64 << PIXEL_SHIFT),
sl->linesize, 4);
}
h->list_counts[mb_xy] = sl->list_count;
if (!SIMPLE && MB_FIELD(sl)) {
linesize = sl->mb_linesize = sl->mb_uvlinesize = sl->linesize * 2;
block_offset = &h->block_offset[48];
if (mb_y & 1) // FIXME move out of this function?
for (p = 0; p < 3; p++)
dest[p] -= sl->linesize * 15;
if (FRAME_MBAFF(h)) {
int list;
for (list = 0; list < sl->list_count; list++) {
if (!USES_LIST(mb_type, list))
continue;
if (IS_16X16(mb_type)) {
int8_t *ref = &sl->ref_cache[list][scan8[0]];
fill_rectangle(ref, 4, 4, 8, (16 + *ref) ^ (sl->mb_y & 1), 1);
} else {
for (i = 0; i < 16; i += 4) {
int ref = sl->ref_cache[list][scan8[i]];
if (ref >= 0)
fill_rectangle(&sl->ref_cache[list][scan8[i]], 2, 2,
8, (16 + ref) ^ (sl->mb_y & 1), 1);
}
}
}
}
} else {
linesize = sl->mb_linesize = sl->mb_uvlinesize = sl->linesize;
}
if (!SIMPLE && IS_INTRA_PCM(mb_type)) {
if (PIXEL_SHIFT) {
const int bit_depth = h->sps.bit_depth_luma;
GetBitContext gb;
init_get_bits(&gb, sl->intra_pcm_ptr, 768 * bit_depth);
for (p = 0; p < plane_count; p++)
for (i = 0; i < 16; i++) {
uint16_t *tmp = (uint16_t *)(dest[p] + i * linesize);
for (j = 0; j < 16; j++)
tmp[j] = get_bits(&gb, bit_depth);
}
} else {
for (p = 0; p < plane_count; p++)
for (i = 0; i < 16; i++)
memcpy(dest[p] + i * linesize,
sl->intra_pcm_ptr + p * 256 + i * 16, 16);
}
} else {
if (IS_INTRA(mb_type)) {
if (sl->deblocking_filter)
xchg_mb_border(h, sl, dest[0], dest[1], dest[2], linesize,
linesize, 1, 1, SIMPLE, PIXEL_SHIFT);
for (p = 0; p < plane_count; p++)
hl_decode_mb_predict_luma(h, sl, mb_type, 1, SIMPLE,
transform_bypass, PIXEL_SHIFT,
block_offset, linesize, dest[p], p);
if (sl->deblocking_filter)
xchg_mb_border(h, sl, dest[0], dest[1], dest[2], linesize,
linesize, 0, 1, SIMPLE, PIXEL_SHIFT);
} else {
FUNC(hl_motion_444)(h, sl, dest[0], dest[1], dest[2],
h->qpel_put, h->h264chroma.put_h264_chroma_pixels_tab,
h->qpel_avg, h->h264chroma.avg_h264_chroma_pixels_tab,
h->h264dsp.weight_h264_pixels_tab,
h->h264dsp.biweight_h264_pixels_tab);
}
for (p = 0; p < plane_count; p++)
hl_decode_mb_idct_luma(h, sl, mb_type, 1, SIMPLE, transform_bypass,
PIXEL_SHIFT, block_offset, linesize,
dest[p], p);
}
}
#endif
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