2 * Copyright (c) 2010-2011 Maxim Poliakovski
3 * Copyright (c) 2010-2011 Elvis Presley
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'acpo' (Proxy), 'ap4h' (4444)
29 #define LONG_BITSTREAM_READER
34 #include "simple_idct.h"
35 #include "proresdec.h"
37 static void permute(uint8_t *dst, const uint8_t *src, const uint8_t permutation[64])
40 for (i = 0; i < 64; i++)
41 dst[i] = permutation[src[i]];
44 static const uint8_t progressive_scan[64] = {
45 0, 1, 8, 9, 2, 3, 10, 11,
46 16, 17, 24, 25, 18, 19, 26, 27,
47 4, 5, 12, 20, 13, 6, 7, 14,
48 21, 28, 29, 22, 15, 23, 30, 31,
49 32, 33, 40, 48, 41, 34, 35, 42,
50 49, 56, 57, 50, 43, 36, 37, 44,
51 51, 58, 59, 52, 45, 38, 39, 46,
52 53, 60, 61, 54, 47, 55, 62, 63
55 static const uint8_t interlaced_scan[64] = {
56 0, 8, 1, 9, 16, 24, 17, 25,
57 2, 10, 3, 11, 18, 26, 19, 27,
58 32, 40, 33, 34, 41, 48, 56, 49,
59 42, 35, 43, 50, 57, 58, 51, 59,
60 4, 12, 5, 6, 13, 20, 28, 21,
61 14, 7, 15, 22, 29, 36, 44, 37,
62 30, 23, 31, 38, 45, 52, 60, 53,
63 46, 39, 47, 54, 61, 62, 55, 63,
66 static av_cold int decode_init(AVCodecContext *avctx)
68 ProresContext *ctx = avctx->priv_data;
69 uint8_t idct_permutation[64];
71 avctx->bits_per_raw_sample = 10;
73 ff_dsputil_init(&ctx->dsp, avctx);
74 ff_proresdsp_init(&ctx->prodsp, avctx);
76 ff_init_scantable_permutation(idct_permutation,
77 ctx->prodsp.idct_permutation_type);
79 permute(ctx->progressive_scan, progressive_scan, idct_permutation);
80 permute(ctx->interlaced_scan, interlaced_scan, idct_permutation);
85 static int decode_frame_header(ProresContext *ctx, const uint8_t *buf,
86 const int data_size, AVCodecContext *avctx)
88 int hdr_size, width, height, flags;
92 hdr_size = AV_RB16(buf);
93 av_dlog(avctx, "header size %d\n", hdr_size);
94 if (hdr_size > data_size) {
95 av_log(avctx, AV_LOG_ERROR, "error, wrong header size\n");
99 version = AV_RB16(buf + 2);
100 av_dlog(avctx, "%.4s version %d\n", buf+4, version);
102 av_log(avctx, AV_LOG_ERROR, "unsupported version: %d\n", version);
106 width = AV_RB16(buf + 8);
107 height = AV_RB16(buf + 10);
108 if (width != avctx->width || height != avctx->height) {
109 av_log(avctx, AV_LOG_ERROR, "picture resolution change: %dx%d -> %dx%d\n",
110 avctx->width, avctx->height, width, height);
114 ctx->frame_type = (buf[12] >> 2) & 3;
116 av_dlog(avctx, "frame type %d\n", ctx->frame_type);
118 if (ctx->frame_type == 0) {
119 ctx->scan = ctx->progressive_scan; // permuted
121 ctx->scan = ctx->interlaced_scan; // permuted
122 ctx->frame->interlaced_frame = 1;
123 ctx->frame->top_field_first = ctx->frame_type == 1;
126 avctx->pix_fmt = (buf[12] & 0xC0) == 0xC0 ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV422P10;
130 av_dlog(avctx, "flags %x\n", flags);
133 if(buf + data_size - ptr < 64) {
134 av_log(avctx, AV_LOG_ERROR, "Header truncated\n");
137 permute(ctx->qmat_luma, ctx->prodsp.idct_permutation, ptr);
140 memset(ctx->qmat_luma, 4, 64);
144 if(buf + data_size - ptr < 64) {
145 av_log(avctx, AV_LOG_ERROR, "Header truncated\n");
148 permute(ctx->qmat_chroma, ctx->prodsp.idct_permutation, ptr);
150 memset(ctx->qmat_chroma, 4, 64);
156 static int decode_picture_header(AVCodecContext *avctx, const uint8_t *buf, const int buf_size)
158 ProresContext *ctx = avctx->priv_data;
159 int i, hdr_size, slice_count;
160 unsigned pic_data_size;
161 int log2_slice_mb_width, log2_slice_mb_height;
162 int slice_mb_count, mb_x, mb_y;
163 const uint8_t *data_ptr, *index_ptr;
165 hdr_size = buf[0] >> 3;
166 if (hdr_size < 8 || hdr_size > buf_size) {
167 av_log(avctx, AV_LOG_ERROR, "error, wrong picture header size\n");
171 pic_data_size = AV_RB32(buf + 1);
172 if (pic_data_size > buf_size) {
173 av_log(avctx, AV_LOG_ERROR, "error, wrong picture data size\n");
177 log2_slice_mb_width = buf[7] >> 4;
178 log2_slice_mb_height = buf[7] & 0xF;
179 if (log2_slice_mb_width > 3 || log2_slice_mb_height) {
180 av_log(avctx, AV_LOG_ERROR, "unsupported slice resolution: %dx%d\n",
181 1 << log2_slice_mb_width, 1 << log2_slice_mb_height);
185 ctx->mb_width = (avctx->width + 15) >> 4;
187 ctx->mb_height = (avctx->height + 31) >> 5;
189 ctx->mb_height = (avctx->height + 15) >> 4;
191 slice_count = AV_RB16(buf + 5);
193 if (ctx->slice_count != slice_count || !ctx->slices) {
194 av_freep(&ctx->slices);
195 ctx->slices = av_mallocz(slice_count * sizeof(*ctx->slices));
197 return AVERROR(ENOMEM);
198 ctx->slice_count = slice_count;
202 return AVERROR(EINVAL);
204 if (hdr_size + slice_count*2 > buf_size) {
205 av_log(avctx, AV_LOG_ERROR, "error, wrong slice count\n");
209 // parse slice information
210 index_ptr = buf + hdr_size;
211 data_ptr = index_ptr + slice_count*2;
213 slice_mb_count = 1 << log2_slice_mb_width;
217 for (i = 0; i < slice_count; i++) {
218 SliceContext *slice = &ctx->slices[i];
220 slice->data = data_ptr;
221 data_ptr += AV_RB16(index_ptr + i*2);
223 while (ctx->mb_width - mb_x < slice_mb_count)
224 slice_mb_count >>= 1;
228 slice->mb_count = slice_mb_count;
229 slice->data_size = data_ptr - slice->data;
231 if (slice->data_size < 6) {
232 av_log(avctx, AV_LOG_ERROR, "error, wrong slice data size\n");
236 mb_x += slice_mb_count;
237 if (mb_x == ctx->mb_width) {
238 slice_mb_count = 1 << log2_slice_mb_width;
242 if (data_ptr > buf + buf_size) {
243 av_log(avctx, AV_LOG_ERROR, "error, slice out of bounds\n");
248 if (mb_x || mb_y != ctx->mb_height) {
249 av_log(avctx, AV_LOG_ERROR, "error wrong mb count y %d h %d\n",
250 mb_y, ctx->mb_height);
254 return pic_data_size;
257 #define DECODE_CODEWORD(val, codebook) \
259 unsigned int rice_order, exp_order, switch_bits; \
260 unsigned int q, buf, bits; \
262 UPDATE_CACHE(re, gb); \
263 buf = GET_CACHE(re, gb); \
265 /* number of bits to switch between rice and exp golomb */ \
266 switch_bits = codebook & 3; \
267 rice_order = codebook >> 5; \
268 exp_order = (codebook >> 2) & 7; \
270 q = 31 - av_log2(buf); \
272 if (q > switch_bits) { /* exp golomb */ \
273 bits = exp_order - switch_bits + (q<<1); \
274 val = SHOW_UBITS(re, gb, bits) - (1 << exp_order) + \
275 ((switch_bits + 1) << rice_order); \
276 SKIP_BITS(re, gb, bits); \
277 } else if (rice_order) { \
278 SKIP_BITS(re, gb, q+1); \
279 val = (q << rice_order) + SHOW_UBITS(re, gb, rice_order); \
280 SKIP_BITS(re, gb, rice_order); \
283 SKIP_BITS(re, gb, q+1); \
287 #define TOSIGNED(x) (((x) >> 1) ^ (-((x) & 1)))
289 #define FIRST_DC_CB 0xB8
291 static const uint8_t dc_codebook[7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70};
293 static av_always_inline void decode_dc_coeffs(GetBitContext *gb, int16_t *out,
294 int blocks_per_slice)
301 DECODE_CODEWORD(code, FIRST_DC_CB);
302 prev_dc = TOSIGNED(code);
305 out += 64; // dc coeff for the next block
309 for (i = 1; i < blocks_per_slice; i++, out += 64) {
310 DECODE_CODEWORD(code, dc_codebook[FFMIN(code, 6U)]);
311 if(code) sign ^= -(code & 1);
313 prev_dc += (((code + 1) >> 1) ^ sign) - sign;
316 CLOSE_READER(re, gb);
319 // adaptive codebook switching lut according to previous run/level values
320 static const uint8_t run_to_cb[16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29, 0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C };
321 static const uint8_t lev_to_cb[10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28, 0x28, 0x28, 0x28, 0x4C };
323 static av_always_inline void decode_ac_coeffs(AVCodecContext *avctx, GetBitContext *gb,
324 int16_t *out, int blocks_per_slice)
326 ProresContext *ctx = avctx->priv_data;
327 int block_mask, sign;
328 unsigned pos, run, level;
329 int max_coeffs, i, bits_left;
330 int log2_block_count = av_log2(blocks_per_slice);
333 UPDATE_CACHE(re, gb); \
337 max_coeffs = 64 << log2_block_count;
338 block_mask = blocks_per_slice - 1;
340 for (pos = block_mask;;) {
341 bits_left = gb->size_in_bits - re_index;
342 if (!bits_left || (bits_left < 32 && !SHOW_UBITS(re, gb, bits_left)))
345 DECODE_CODEWORD(run, run_to_cb[FFMIN(run, 15)]);
347 if (pos >= max_coeffs) {
348 av_log(avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", pos, max_coeffs);
352 DECODE_CODEWORD(level, lev_to_cb[FFMIN(level, 9)]);
355 i = pos >> log2_block_count;
357 sign = SHOW_SBITS(re, gb, 1);
358 SKIP_BITS(re, gb, 1);
359 out[((pos & block_mask) << 6) + ctx->scan[i]] = ((level ^ sign) - sign);
362 CLOSE_READER(re, gb);
365 static void decode_slice_luma(AVCodecContext *avctx, SliceContext *slice,
366 uint16_t *dst, int dst_stride,
367 const uint8_t *buf, unsigned buf_size,
370 ProresContext *ctx = avctx->priv_data;
371 LOCAL_ALIGNED_16(int16_t, blocks, [8*4*64]);
374 int i, blocks_per_slice = slice->mb_count<<2;
376 for (i = 0; i < blocks_per_slice; i++)
377 ctx->dsp.clear_block(blocks+(i<<6));
379 init_get_bits(&gb, buf, buf_size << 3);
381 decode_dc_coeffs(&gb, blocks, blocks_per_slice);
382 decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice);
385 for (i = 0; i < slice->mb_count; i++) {
386 ctx->prodsp.idct_put(dst, dst_stride, block+(0<<6), qmat);
387 ctx->prodsp.idct_put(dst +8, dst_stride, block+(1<<6), qmat);
388 ctx->prodsp.idct_put(dst+4*dst_stride , dst_stride, block+(2<<6), qmat);
389 ctx->prodsp.idct_put(dst+4*dst_stride+8, dst_stride, block+(3<<6), qmat);
395 static void decode_slice_chroma(AVCodecContext *avctx, SliceContext *slice,
396 uint16_t *dst, int dst_stride,
397 const uint8_t *buf, unsigned buf_size,
398 const int16_t *qmat, int log2_blocks_per_mb)
400 ProresContext *ctx = avctx->priv_data;
401 LOCAL_ALIGNED_16(int16_t, blocks, [8*4*64]);
404 int i, j, blocks_per_slice = slice->mb_count << log2_blocks_per_mb;
406 for (i = 0; i < blocks_per_slice; i++)
407 ctx->dsp.clear_block(blocks+(i<<6));
409 init_get_bits(&gb, buf, buf_size << 3);
411 decode_dc_coeffs(&gb, blocks, blocks_per_slice);
412 decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice);
415 for (i = 0; i < slice->mb_count; i++) {
416 for (j = 0; j < log2_blocks_per_mb; j++) {
417 ctx->prodsp.idct_put(dst, dst_stride, block+(0<<6), qmat);
418 ctx->prodsp.idct_put(dst+4*dst_stride, dst_stride, block+(1<<6), qmat);
425 static int decode_slice_thread(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
427 ProresContext *ctx = avctx->priv_data;
428 SliceContext *slice = &ctx->slices[jobnr];
429 const uint8_t *buf = slice->data;
430 AVFrame *pic = ctx->frame;
431 int i, hdr_size, qscale, log2_chroma_blocks_per_mb;
432 int luma_stride, chroma_stride;
433 int y_data_size, u_data_size, v_data_size;
434 uint8_t *dest_y, *dest_u, *dest_v;
435 int16_t qmat_luma_scaled[64];
436 int16_t qmat_chroma_scaled[64];
440 //av_log(avctx, AV_LOG_INFO, "slice %d mb width %d mb x %d y %d\n",
441 // jobnr, slice->mb_count, slice->mb_x, slice->mb_y);
444 hdr_size = buf[0] >> 3;
445 qscale = av_clip(buf[1], 1, 224);
446 qscale = qscale > 128 ? qscale - 96 << 2: qscale;
447 y_data_size = AV_RB16(buf + 2);
448 u_data_size = AV_RB16(buf + 4);
449 v_data_size = slice->data_size - y_data_size - u_data_size - hdr_size;
450 if (hdr_size > 7) v_data_size = AV_RB16(buf + 6);
452 if (y_data_size < 0 || u_data_size < 0 || v_data_size < 0
453 || hdr_size+y_data_size+u_data_size+v_data_size > slice->data_size){
454 av_log(avctx, AV_LOG_ERROR, "invalid plane data size\n");
460 for (i = 0; i < 64; i++) {
461 qmat_luma_scaled [i] = ctx->qmat_luma [i] * qscale;
462 qmat_chroma_scaled[i] = ctx->qmat_chroma[i] * qscale;
465 if (ctx->frame_type == 0) {
466 luma_stride = pic->linesize[0];
467 chroma_stride = pic->linesize[1];
469 luma_stride = pic->linesize[0] << 1;
470 chroma_stride = pic->linesize[1] << 1;
473 if (avctx->pix_fmt == AV_PIX_FMT_YUV444P10) {
475 log2_chroma_blocks_per_mb = 2;
478 log2_chroma_blocks_per_mb = 1;
481 dest_y = pic->data[0] + (slice->mb_y << 4) * luma_stride + (slice->mb_x << 5);
482 dest_u = pic->data[1] + (slice->mb_y << 4) * chroma_stride + (slice->mb_x << mb_x_shift);
483 dest_v = pic->data[2] + (slice->mb_y << 4) * chroma_stride + (slice->mb_x << mb_x_shift);
485 if (ctx->frame_type && ctx->first_field ^ ctx->frame->top_field_first) {
486 dest_y += pic->linesize[0];
487 dest_u += pic->linesize[1];
488 dest_v += pic->linesize[2];
491 decode_slice_luma(avctx, slice, (uint16_t*)dest_y, luma_stride,
492 buf, y_data_size, qmat_luma_scaled);
494 if (!(avctx->flags & CODEC_FLAG_GRAY)) {
495 decode_slice_chroma(avctx, slice, (uint16_t*)dest_u, chroma_stride,
496 buf + y_data_size, u_data_size,
497 qmat_chroma_scaled, log2_chroma_blocks_per_mb);
498 decode_slice_chroma(avctx, slice, (uint16_t*)dest_v, chroma_stride,
499 buf + y_data_size + u_data_size, v_data_size,
500 qmat_chroma_scaled, log2_chroma_blocks_per_mb);
507 static int decode_picture(AVCodecContext *avctx)
509 ProresContext *ctx = avctx->priv_data;
512 avctx->execute2(avctx, decode_slice_thread, NULL, NULL, ctx->slice_count);
514 for (i = 0; i < ctx->slice_count; i++)
515 if (ctx->slices[i].ret < 0)
516 return ctx->slices[i].ret;
521 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
524 ProresContext *ctx = avctx->priv_data;
525 AVFrame *frame = data;
526 const uint8_t *buf = avpkt->data;
527 int buf_size = avpkt->size;
528 int frame_hdr_size, pic_size;
530 if (buf_size < 28 || AV_RL32(buf + 4) != AV_RL32("icpf")) {
531 av_log(avctx, AV_LOG_ERROR, "invalid frame header\n");
536 ctx->frame->pict_type = AV_PICTURE_TYPE_I;
537 ctx->frame->key_frame = 1;
538 ctx->first_field = 1;
543 frame_hdr_size = decode_frame_header(ctx, buf, buf_size, avctx);
544 if (frame_hdr_size < 0)
547 buf += frame_hdr_size;
548 buf_size -= frame_hdr_size;
550 if (ff_get_buffer(avctx, frame, 0) < 0)
554 pic_size = decode_picture_header(avctx, buf, buf_size);
556 av_log(avctx, AV_LOG_ERROR, "error decoding picture header\n");
560 if (decode_picture(avctx)) {
561 av_log(avctx, AV_LOG_ERROR, "error decoding picture\n");
566 buf_size -= pic_size;
568 if (ctx->frame_type && buf_size > 0 && ctx->first_field) {
569 ctx->first_field = 0;
578 static av_cold int decode_close(AVCodecContext *avctx)
580 ProresContext *ctx = avctx->priv_data;
582 av_freep(&ctx->slices);
587 AVCodec ff_prores_decoder = {
589 .type = AVMEDIA_TYPE_VIDEO,
590 .id = AV_CODEC_ID_PRORES,
591 .priv_data_size = sizeof(ProresContext),
593 .close = decode_close,
594 .decode = decode_frame,
595 .long_name = NULL_IF_CONFIG_SMALL("ProRes"),
596 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS,