2 * Apple ProRes compatible decoder
4 * Copyright (c) 2010-2011 Maxim Poliakovski
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * This is a decoder for Apple ProRes 422 SD/HQ/LT/Proxy and ProRes 4444.
26 * It is used for storing and editing high definition video data in Apple's Final Cut Pro.
28 * @see http://wiki.multimedia.cx/index.php?title=Apple_ProRes
31 #define LONG_BITSTREAM_READER // some ProRes vlc codes require up to 28 bits to be read at once
35 #include "libavutil/intmath.h"
39 #include "proresdata.h"
40 #include "proresdsp.h"
43 typedef struct ProresThreadData {
44 const uint8_t *index; ///< pointers to the data of this slice
48 int prev_slice_sf; ///< scalefactor of the previous decoded slice
49 DECLARE_ALIGNED(16, int16_t, blocks)[8 * 4 * 64];
50 DECLARE_ALIGNED(16, int16_t, qmat_luma_scaled)[64];
51 DECLARE_ALIGNED(16, int16_t, qmat_chroma_scaled)[64];
54 typedef struct ProresContext {
58 int scantable_type; ///< -1 = uninitialized, 0 = progressive, 1/2 = interlaced
60 int frame_type; ///< 0 = progressive, 1 = top-field first, 2 = bottom-field first
61 int pic_format; ///< 2 = 422, 3 = 444
62 uint8_t qmat_luma[64]; ///< dequantization matrix for luma
63 uint8_t qmat_chroma[64]; ///< dequantization matrix for chroma
64 int qmat_changed; ///< 1 - global quantization matrices changed
65 int total_slices; ///< total number of slices in a picture
66 ProresThreadData *slice_data;
70 int num_chroma_blocks; ///< number of chrominance blocks in a macroblock
73 int slice_width_factor;
74 int slice_height_factor;
81 static av_cold int decode_init(AVCodecContext *avctx)
83 ProresContext *ctx = avctx->priv_data;
85 ctx->total_slices = 0;
86 ctx->slice_data = NULL;
88 avctx->bits_per_raw_sample = PRORES_BITS_PER_SAMPLE;
89 ff_proresdsp_init(&ctx->dsp, avctx);
91 ctx->scantable_type = -1; // set scantable type to uninitialized
92 memset(ctx->qmat_luma, 4, 64);
93 memset(ctx->qmat_chroma, 4, 64);
99 static int decode_frame_header(ProresContext *ctx, const uint8_t *buf,
100 const int data_size, AVCodecContext *avctx)
102 int hdr_size, version, width, height, flags;
105 hdr_size = AV_RB16(buf);
106 if (hdr_size > data_size) {
107 av_log(avctx, AV_LOG_ERROR, "frame data too small\n");
108 return AVERROR_INVALIDDATA;
111 version = AV_RB16(buf + 2);
113 av_log(avctx, AV_LOG_ERROR,
114 "unsupported header version: %d\n", version);
115 return AVERROR_INVALIDDATA;
118 width = AV_RB16(buf + 8);
119 height = AV_RB16(buf + 10);
120 if (width != avctx->width || height != avctx->height) {
121 av_log(avctx, AV_LOG_ERROR,
122 "picture dimension changed: old: %d x %d, new: %d x %d\n",
123 avctx->width, avctx->height, width, height);
124 return AVERROR_INVALIDDATA;
127 ctx->frame_type = (buf[12] >> 2) & 3;
128 if (ctx->frame_type > 2) {
129 av_log(avctx, AV_LOG_ERROR,
130 "unsupported frame type: %d\n", ctx->frame_type);
131 return AVERROR_INVALIDDATA;
134 ctx->chroma_factor = (buf[12] >> 6) & 3;
135 ctx->mb_chroma_factor = ctx->chroma_factor + 2;
136 ctx->num_chroma_blocks = (1 << ctx->chroma_factor) >> 1;
137 ctx->alpha_info = buf[17] & 0xf;
139 if (ctx->alpha_info > 2) {
140 av_log(avctx, AV_LOG_ERROR, "Invalid alpha mode %d\n", ctx->alpha_info);
141 return AVERROR_INVALIDDATA;
143 if (avctx->skip_alpha) ctx->alpha_info = 0;
145 switch (ctx->chroma_factor) {
147 avctx->pix_fmt = ctx->alpha_info ? AV_PIX_FMT_YUVA422P10
148 : AV_PIX_FMT_YUV422P10;
151 avctx->pix_fmt = ctx->alpha_info ? AV_PIX_FMT_YUVA444P10
152 : AV_PIX_FMT_YUV444P10;
155 av_log(avctx, AV_LOG_ERROR,
156 "unsupported picture format: %d\n", ctx->pic_format);
157 return AVERROR_INVALIDDATA;
160 if (ctx->scantable_type != ctx->frame_type) {
161 if (!ctx->frame_type)
162 ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable,
163 ff_prores_progressive_scan);
165 ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable,
166 ff_prores_interlaced_scan);
167 ctx->scantable_type = ctx->frame_type;
170 if (ctx->frame_type) { /* if interlaced */
171 ctx->frame->interlaced_frame = 1;
172 ctx->frame->top_field_first = ctx->frame_type & 1;
174 ctx->frame->interlaced_frame = 0;
177 avctx->color_primaries = buf[14];
178 avctx->color_trc = buf[15];
179 avctx->colorspace = buf[16];
180 avctx->color_range = AVCOL_RANGE_MPEG;
182 ctx->qmat_changed = 0;
186 if (ptr - buf > hdr_size - 64) {
187 av_log(avctx, AV_LOG_ERROR, "header data too small\n");
188 return AVERROR_INVALIDDATA;
190 if (memcmp(ctx->qmat_luma, ptr, 64)) {
191 memcpy(ctx->qmat_luma, ptr, 64);
192 ctx->qmat_changed = 1;
196 memset(ctx->qmat_luma, 4, 64);
197 ctx->qmat_changed = 1;
201 if (ptr - buf > hdr_size - 64) {
202 av_log(avctx, AV_LOG_ERROR, "header data too small\n");
205 if (memcmp(ctx->qmat_chroma, ptr, 64)) {
206 memcpy(ctx->qmat_chroma, ptr, 64);
207 ctx->qmat_changed = 1;
210 memset(ctx->qmat_chroma, 4, 64);
211 ctx->qmat_changed = 1;
218 static int decode_picture_header(ProresContext *ctx, const uint8_t *buf,
219 const int data_size, AVCodecContext *avctx)
221 int i, hdr_size, pic_data_size, num_slices;
222 int slice_width_factor, slice_height_factor;
223 int remainder, num_x_slices;
224 const uint8_t *data_ptr, *index_ptr;
226 hdr_size = data_size > 0 ? buf[0] >> 3 : 0;
227 if (hdr_size < 8 || hdr_size > data_size) {
228 av_log(avctx, AV_LOG_ERROR, "picture header too small\n");
229 return AVERROR_INVALIDDATA;
232 pic_data_size = AV_RB32(buf + 1);
233 if (pic_data_size > data_size) {
234 av_log(avctx, AV_LOG_ERROR, "picture data too small\n");
235 return AVERROR_INVALIDDATA;
238 slice_width_factor = buf[7] >> 4;
239 slice_height_factor = buf[7] & 0xF;
240 if (slice_width_factor > 3 || slice_height_factor) {
241 av_log(avctx, AV_LOG_ERROR,
242 "unsupported slice dimension: %d x %d\n",
243 1 << slice_width_factor, 1 << slice_height_factor);
244 return AVERROR_INVALIDDATA;
247 ctx->slice_width_factor = slice_width_factor;
248 ctx->slice_height_factor = slice_height_factor;
250 ctx->num_x_mbs = (avctx->width + 15) >> 4;
251 ctx->num_y_mbs = (avctx->height +
252 (1 << (4 + ctx->frame->interlaced_frame)) - 1) >>
253 (4 + ctx->frame->interlaced_frame);
255 remainder = av_mod_uintp2(ctx->num_x_mbs, slice_width_factor);
256 num_x_slices = (ctx->num_x_mbs >> slice_width_factor) + (remainder & 1) +
257 ((remainder >> 1) & 1) + ((remainder >> 2) & 1);
259 num_slices = num_x_slices * ctx->num_y_mbs;
260 if (num_slices != AV_RB16(buf + 5)) {
261 av_log(avctx, AV_LOG_ERROR, "invalid number of slices\n");
262 return AVERROR_INVALIDDATA;
265 if (ctx->total_slices != num_slices) {
266 av_freep(&ctx->slice_data);
267 ctx->slice_data = av_malloc_array(num_slices + 1, sizeof(ctx->slice_data[0]));
268 if (!ctx->slice_data)
269 return AVERROR(ENOMEM);
270 ctx->total_slices = num_slices;
273 if (hdr_size + num_slices * 2 > data_size) {
274 av_log(avctx, AV_LOG_ERROR, "slice table too small\n");
275 return AVERROR_INVALIDDATA;
278 /* parse slice table allowing quick access to the slice data */
279 index_ptr = buf + hdr_size;
280 data_ptr = index_ptr + num_slices * 2;
282 for (i = 0; i < num_slices; i++) {
283 ctx->slice_data[i].index = data_ptr;
284 ctx->slice_data[i].prev_slice_sf = 0;
285 data_ptr += AV_RB16(index_ptr + i * 2);
287 ctx->slice_data[i].index = data_ptr;
288 ctx->slice_data[i].prev_slice_sf = 0;
290 if (data_ptr > buf + data_size) {
291 av_log(avctx, AV_LOG_ERROR, "out of slice data\n");
295 return pic_data_size;
300 * Read an unsigned rice/exp golomb codeword.
302 static inline int decode_vlc_codeword(GetBitContext *gb, unsigned codebook)
304 unsigned int rice_order, exp_order, switch_bits;
305 unsigned int buf, code;
306 int log, prefix_len, len;
309 UPDATE_CACHE(re, gb);
310 buf = GET_CACHE(re, gb);
312 /* number of prefix bits to switch between Rice and expGolomb */
313 switch_bits = (codebook & 3) + 1;
314 rice_order = codebook >> 5; /* rice code order */
315 exp_order = (codebook >> 2) & 7; /* exp golomb code order */
317 log = 31 - av_log2(buf); /* count prefix bits (zeroes) */
319 if (log < switch_bits) { /* ok, we got a rice code */
321 /* shortcut for faster decoding of rice codes without remainder */
323 LAST_SKIP_BITS(re, gb, log + 1);
325 prefix_len = log + 1;
326 code = (log << rice_order) + NEG_USR32(buf << prefix_len, rice_order);
327 LAST_SKIP_BITS(re, gb, prefix_len + rice_order);
329 } else { /* otherwise we got a exp golomb code */
330 len = (log << 1) - switch_bits + exp_order + 1;
331 code = NEG_USR32(buf, len) - (1 << exp_order) + (switch_bits << rice_order);
332 LAST_SKIP_BITS(re, gb, len);
335 CLOSE_READER(re, gb);
340 #define LSB2SIGN(x) (-((x) & 1))
341 #define TOSIGNED(x) (((x) >> 1) ^ LSB2SIGN(x))
344 * Decode DC coefficients for all blocks in a slice.
346 static inline void decode_dc_coeffs(GetBitContext *gb, int16_t *out,
354 code = decode_vlc_codeword(gb, FIRST_DC_CB);
355 out[0] = prev_dc = TOSIGNED(code);
357 out += 64; /* move to the DC coeff of the next block */
360 for (i = 1; i < nblocks; i++, out += 64) {
361 code = decode_vlc_codeword(gb, ff_prores_dc_codebook[FFMIN(FFABS(delta), 3)]);
363 sign = -(((delta >> 15) & 1) ^ (code & 1));
364 delta = (((code + 1) >> 1) ^ sign) - sign;
370 #define MAX_PADDING 16
373 * Decode AC coefficients for all blocks in a slice.
375 static inline int decode_ac_coeffs(GetBitContext *gb, int16_t *out,
376 int blocks_per_slice,
377 int plane_size_factor,
380 int pos, block_mask, run, level, sign, run_cb_index, lev_cb_index;
381 int max_coeffs, bits_left;
383 /* set initial prediction values */
387 max_coeffs = blocks_per_slice << 6;
388 block_mask = blocks_per_slice - 1;
390 for (pos = blocks_per_slice - 1; pos < max_coeffs;) {
391 run_cb_index = ff_prores_run_to_cb_index[FFMIN(run, 15)];
392 lev_cb_index = ff_prores_lev_to_cb_index[FFMIN(level, 9)];
394 bits_left = get_bits_left(gb);
395 if (bits_left <= 0 || (bits_left <= MAX_PADDING && !show_bits(gb, bits_left)))
398 run = decode_vlc_codeword(gb, ff_prores_ac_codebook[run_cb_index]);
400 return AVERROR_INVALIDDATA;
402 bits_left = get_bits_left(gb);
403 if (bits_left <= 0 || (bits_left <= MAX_PADDING && !show_bits(gb, bits_left)))
404 return AVERROR_INVALIDDATA;
406 level = decode_vlc_codeword(gb, ff_prores_ac_codebook[lev_cb_index]) + 1;
408 return AVERROR_INVALIDDATA;
411 if (pos >= max_coeffs)
414 sign = get_sbits(gb, 1);
415 out[((pos & block_mask) << 6) + scan[pos >> plane_size_factor]] =
416 (level ^ sign) - sign;
424 * Decode a slice plane (luma or chroma).
426 static int decode_slice_plane(ProresContext *ctx, ProresThreadData *td,
428 int data_size, uint16_t *out_ptr,
429 int linesize, int mbs_per_slice,
430 int blocks_per_mb, int plane_size_factor,
431 const int16_t *qmat, int is_chroma)
435 int mb_num, blocks_per_slice, ret;
437 blocks_per_slice = mbs_per_slice * blocks_per_mb;
439 memset(td->blocks, 0, 8 * 4 * 64 * sizeof(*td->blocks));
441 init_get_bits(&gb, buf, data_size << 3);
443 decode_dc_coeffs(&gb, td->blocks, blocks_per_slice);
445 ret = decode_ac_coeffs(&gb, td->blocks, blocks_per_slice,
446 plane_size_factor, ctx->scantable.permutated);
450 /* inverse quantization, inverse transform and output */
451 block_ptr = td->blocks;
454 for (mb_num = 0; mb_num < mbs_per_slice; mb_num++, out_ptr += blocks_per_mb * 4) {
455 ctx->dsp.idct_put(out_ptr, linesize, block_ptr, qmat);
457 if (blocks_per_mb > 2) {
458 ctx->dsp.idct_put(out_ptr + 8, linesize, block_ptr, qmat);
461 ctx->dsp.idct_put(out_ptr + linesize * 4, linesize, block_ptr, qmat);
463 if (blocks_per_mb > 2) {
464 ctx->dsp.idct_put(out_ptr + linesize * 4 + 8, linesize, block_ptr, qmat);
469 for (mb_num = 0; mb_num < mbs_per_slice; mb_num++, out_ptr += blocks_per_mb * 4) {
470 ctx->dsp.idct_put(out_ptr, linesize, block_ptr, qmat);
472 ctx->dsp.idct_put(out_ptr + linesize * 4, linesize, block_ptr, qmat);
474 if (blocks_per_mb > 2) {
475 ctx->dsp.idct_put(out_ptr + 8, linesize, block_ptr, qmat);
477 ctx->dsp.idct_put(out_ptr + linesize * 4 + 8, linesize, block_ptr, qmat);
486 static void unpack_alpha(GetBitContext *gb, uint16_t *dst, int num_coeffs,
489 const int mask = (1 << num_bits) - 1;
490 int i, idx, val, alpha_val;
497 val = get_bits(gb, num_bits);
500 val = get_bits(gb, num_bits == 16 ? 7 : 4);
502 val = (val + 2) >> 1;
506 alpha_val = (alpha_val + val) & mask;
508 dst[idx++] = alpha_val >> 6;
510 dst[idx++] = (alpha_val << 2) | (alpha_val >> 6);
511 if (idx >= num_coeffs) {
514 } while (get_bits1(gb));
515 val = get_bits(gb, 4);
517 val = get_bits(gb, 11);
518 if (idx + val > num_coeffs)
519 val = num_coeffs - idx;
521 for (i = 0; i < val; i++)
522 dst[idx++] = alpha_val >> 6;
524 for (i = 0; i < val; i++)
525 dst[idx++] = (alpha_val << 2) | (alpha_val >> 6);
526 } while (idx < num_coeffs);
530 * Decode alpha slice plane.
532 static void decode_alpha_plane(ProresContext *ctx, ProresThreadData *td,
533 const uint8_t *buf, int data_size,
534 uint16_t *out_ptr, int linesize,
541 memset(td->blocks, 0, 8 * 4 * 64 * sizeof(*td->blocks));
543 init_get_bits(&gb, buf, data_size << 3);
545 if (ctx->alpha_info == 2)
546 unpack_alpha(&gb, td->blocks, mbs_per_slice * 4 * 64, 16);
548 unpack_alpha(&gb, td->blocks, mbs_per_slice * 4 * 64, 8);
550 block_ptr = td->blocks;
552 for (i = 0; i < 16; i++) {
553 memcpy(out_ptr, block_ptr, 16 * mbs_per_slice * sizeof(*out_ptr));
554 out_ptr += linesize >> 1;
555 block_ptr += 16 * mbs_per_slice;
559 static int decode_slice(AVCodecContext *avctx, void *tdata)
561 ProresThreadData *td = tdata;
562 ProresContext *ctx = avctx->priv_data;
563 int mb_x_pos = td->x_pos;
564 int mb_y_pos = td->y_pos;
565 int pic_num = ctx->pic_num;
566 int slice_num = td->slice_num;
567 int mbs_per_slice = td->slice_width;
569 uint8_t *y_data, *u_data, *v_data, *a_data;
570 AVFrame *pic = ctx->frame;
571 int i, sf, slice_width_factor;
572 int slice_data_size, hdr_size;
573 int y_data_size, u_data_size, v_data_size, a_data_size;
574 int y_linesize, u_linesize, v_linesize, a_linesize;
578 buf = ctx->slice_data[slice_num].index;
579 slice_data_size = ctx->slice_data[slice_num + 1].index - buf;
581 slice_width_factor = av_log2(mbs_per_slice);
583 y_data = pic->data[0];
584 u_data = pic->data[1];
585 v_data = pic->data[2];
586 a_data = pic->data[3];
587 y_linesize = pic->linesize[0];
588 u_linesize = pic->linesize[1];
589 v_linesize = pic->linesize[2];
590 a_linesize = pic->linesize[3];
592 if (pic->interlaced_frame) {
593 if (!(pic_num ^ pic->top_field_first)) {
594 y_data += y_linesize;
595 u_data += u_linesize;
596 v_data += v_linesize;
598 a_data += a_linesize;
605 y_data += (mb_y_pos << 4) * y_linesize + (mb_x_pos << 5);
606 u_data += (mb_y_pos << 4) * u_linesize + (mb_x_pos << ctx->mb_chroma_factor);
607 v_data += (mb_y_pos << 4) * v_linesize + (mb_x_pos << ctx->mb_chroma_factor);
609 a_data += (mb_y_pos << 4) * a_linesize + (mb_x_pos << 5);
611 if (slice_data_size < 6) {
612 av_log(avctx, AV_LOG_ERROR, "slice data too small\n");
613 return AVERROR_INVALIDDATA;
616 /* parse slice header */
617 hdr_size = buf[0] >> 3;
619 y_data_size = AV_RB16(buf + 2);
620 coff[1] = coff[0] + y_data_size;
621 u_data_size = AV_RB16(buf + 4);
622 coff[2] = coff[1] + u_data_size;
623 v_data_size = hdr_size > 7 ? AV_RB16(buf + 6) : slice_data_size - coff[2];
624 coff[3] = coff[2] + v_data_size;
625 a_data_size = ctx->alpha_info ? slice_data_size - coff[3] : 0;
627 /* if V or alpha component size is negative that means that previous
628 component sizes are too large */
629 if (v_data_size < 0 || a_data_size < 0 || hdr_size < 6 || coff[3] > slice_data_size) {
630 av_log(avctx, AV_LOG_ERROR, "invalid data size\n");
631 return AVERROR_INVALIDDATA;
634 sf = av_clip(buf[1], 1, 224);
635 sf = sf > 128 ? (sf - 96) << 2 : sf;
637 /* scale quantization matrixes according with slice's scale factor */
638 /* TODO: this can be SIMD-optimized a lot */
639 if (ctx->qmat_changed || sf != td->prev_slice_sf) {
640 td->prev_slice_sf = sf;
641 for (i = 0; i < 64; i++) {
642 td->qmat_luma_scaled[ctx->dsp.idct_permutation[i]] = ctx->qmat_luma[i] * sf;
643 td->qmat_chroma_scaled[ctx->dsp.idct_permutation[i]] = ctx->qmat_chroma[i] * sf;
647 /* decode luma plane */
648 ret = decode_slice_plane(ctx, td, buf + coff[0], y_data_size,
649 (uint16_t*) y_data, y_linesize,
650 mbs_per_slice, 4, slice_width_factor + 2,
651 td->qmat_luma_scaled, 0);
656 /* decode U chroma plane */
657 ret = decode_slice_plane(ctx, td, buf + coff[1], u_data_size,
658 (uint16_t*) u_data, u_linesize,
659 mbs_per_slice, ctx->num_chroma_blocks,
660 slice_width_factor + ctx->chroma_factor - 1,
661 td->qmat_chroma_scaled, 1);
665 /* decode V chroma plane */
666 ret = decode_slice_plane(ctx, td, buf + coff[2], v_data_size,
667 (uint16_t*) v_data, v_linesize,
668 mbs_per_slice, ctx->num_chroma_blocks,
669 slice_width_factor + ctx->chroma_factor - 1,
670 td->qmat_chroma_scaled, 1);
674 /* decode alpha plane if available */
675 if (a_data && a_data_size)
676 decode_alpha_plane(ctx, td, buf + coff[3], a_data_size,
677 (uint16_t*) a_data, a_linesize,
684 static int decode_picture(ProresContext *ctx, int pic_num,
685 AVCodecContext *avctx)
687 int slice_num, slice_width, x_pos, y_pos;
691 ctx->pic_num = pic_num;
692 for (y_pos = 0; y_pos < ctx->num_y_mbs; y_pos++) {
693 slice_width = 1 << ctx->slice_width_factor;
695 for (x_pos = 0; x_pos < ctx->num_x_mbs && slice_width;
696 x_pos += slice_width) {
697 while (ctx->num_x_mbs - x_pos < slice_width)
700 ctx->slice_data[slice_num].slice_num = slice_num;
701 ctx->slice_data[slice_num].x_pos = x_pos;
702 ctx->slice_data[slice_num].y_pos = y_pos;
703 ctx->slice_data[slice_num].slice_width = slice_width;
709 return avctx->execute(avctx, decode_slice,
710 ctx->slice_data, NULL, slice_num,
711 sizeof(ctx->slice_data[0]));
715 #define MOVE_DATA_PTR(nbytes) buf += (nbytes); buf_size -= (nbytes)
717 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
720 ProresContext *ctx = avctx->priv_data;
721 const uint8_t *buf = avpkt->data;
722 int buf_size = avpkt->size;
723 int frame_hdr_size, pic_num, pic_data_size;
726 ctx->frame->pict_type = AV_PICTURE_TYPE_I;
727 ctx->frame->key_frame = 1;
729 /* check frame atom container */
730 if (buf_size < 28 || buf_size < AV_RB32(buf) ||
731 AV_RB32(buf + 4) != FRAME_ID) {
732 av_log(avctx, AV_LOG_ERROR, "invalid frame\n");
733 return AVERROR_INVALIDDATA;
738 frame_hdr_size = decode_frame_header(ctx, buf, buf_size, avctx);
739 if (frame_hdr_size < 0)
740 return AVERROR_INVALIDDATA;
742 MOVE_DATA_PTR(frame_hdr_size);
744 if (ff_get_buffer(avctx, ctx->frame, 0) < 0)
747 for (pic_num = 0; ctx->frame->interlaced_frame - pic_num + 1; pic_num++) {
748 pic_data_size = decode_picture_header(ctx, buf, buf_size, avctx);
749 if (pic_data_size < 0)
750 return AVERROR_INVALIDDATA;
752 if (decode_picture(ctx, pic_num, avctx))
755 MOVE_DATA_PTR(pic_data_size);
765 static av_cold int decode_close(AVCodecContext *avctx)
767 ProresContext *ctx = avctx->priv_data;
769 av_freep(&ctx->slice_data);
775 AVCodec ff_prores_lgpl_decoder = {
776 .name = "prores_lgpl",
777 .long_name = NULL_IF_CONFIG_SMALL("Apple ProRes (iCodec Pro)"),
778 .type = AVMEDIA_TYPE_VIDEO,
779 .id = AV_CODEC_ID_PRORES,
780 .priv_data_size = sizeof(ProresContext),
782 .close = decode_close,
783 .decode = decode_frame,
784 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,