--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation;
+ * version 2 of the License.
+ *
+ * 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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
+ */
+
+/**
+ * @file libavcodec/proresdec.c
+ * Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'acpo' (Proxy), 'ap4c' (4444)
+ */
+
+//#define DEBUG
+
+#define A32_BITSTREAM_READER
+
+#include "avcodec.h"
+#include "get_bits.h"
+#include "dsputil.h"
+#include "simple_idct.h"
+
+typedef struct {
+ const uint8_t *data;
+ unsigned mb_x;
+ unsigned mb_y;
+ unsigned mb_count;
+ unsigned data_size;
+} SliceContext;
+
+typedef struct {
+ AVFrame frame;
+ DSPContext dsp;
+ int frame_type; ///< 0 = progressive, 1 = tff, 2 = bff
+ uint8_t qmat_luma[64];
+ uint8_t qmat_chroma[64];
+ SliceContext *slices;
+ int slice_count; ///< number of slices in the current picture
+ unsigned mb_width; ///< width of the current picture in mb
+ unsigned mb_height; ///< height of the current picture in mb
+ uint8_t progressive_scan[64];
+ uint8_t interlaced_scan[64];
+ const uint8_t *scan;
+ int first_field;
+ void (*idct_put)(DCTELEM *, uint8_t *restrict, int);
+} ProresContext;
+
+static void permute(uint8_t *dst, const uint8_t *src, const uint8_t permutation[64])
+{
+ int i;
+ for (i = 0; i < 64; i++)
+ dst[i] = permutation[src[i]];
+}
+
+static av_always_inline void put_pixels(const DCTELEM *block, uint8_t *restrict pixels, int stride)
+{
+ int16_t *p = (int16_t*)pixels;
+ int i, j;
+
+ stride >>= 1;
+ for(i = 0; i < 8; i++) {
+ for (j = 0; j < 8; j++) {
+ p[j] = av_clip(block[j], 4, 1019);
+ }
+ p += stride;
+ block += 8;
+ }
+}
+
+static void idct_put(DCTELEM *block, uint8_t *restrict pixels, int stride)
+{
+ ff_simple_idct_10(block);
+ put_pixels(block, pixels, stride);
+}
+
+static const uint8_t progressive_scan[64] = {
+ 0, 1, 8, 9, 2, 3, 10, 11,
+ 16, 17, 24, 25, 18, 19, 26, 27,
+ 4, 5, 12, 20, 13, 6, 7, 14,
+ 21, 28, 29, 22, 15, 23, 30, 31,
+ 32, 33, 40, 48, 41, 34, 35, 42,
+ 49, 56, 57, 50, 43, 36, 37, 44,
+ 51, 58, 59, 52, 45, 38, 39, 46,
+ 53, 60, 61, 54, 47, 55, 62, 63
+};
+
+static const uint8_t interlaced_scan[64] = {
+ 0, 8, 1, 9, 16, 24, 17, 25,
+ 2, 10, 3, 11, 18, 26, 19, 27,
+ 32, 40, 33, 34, 41, 48, 56, 49,
+ 42, 35, 43, 50, 57, 58, 51, 59,
+ 4, 12, 5, 6, 13, 20, 28, 21,
+ 14, 7, 15, 22, 29, 36, 44, 37,
+ 30, 23, 31, 38, 45, 52, 60, 53,
+ 46, 39, 47, 54, 61, 62, 55, 63,
+};
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+ ProresContext *ctx = avctx->priv_data;
+
+ avctx->bits_per_raw_sample = 10;
+
+ dsputil_init(&ctx->dsp, avctx);
+
+ avctx->coded_frame = &ctx->frame;
+ ctx->frame.type = FF_I_TYPE;
+ ctx->frame.key_frame = 1;
+
+ ctx->idct_put = idct_put;
+ memcpy(ctx->progressive_scan, progressive_scan, sizeof(progressive_scan));
+ memcpy(ctx->interlaced_scan, interlaced_scan, sizeof(interlaced_scan));
+
+ return 0;
+}
+
+static int decode_frame_header(ProresContext *ctx, const uint8_t *buf,
+ const int data_size, AVCodecContext *avctx)
+{
+ int hdr_size, width, height, flags;
+ int version;
+ const uint8_t *ptr;
+ const uint8_t *scan;
+
+ hdr_size = AV_RB16(buf);
+ av_dlog(avctx, "header size %d\n", hdr_size);
+ if (hdr_size > data_size) {
+ av_log(avctx, AV_LOG_ERROR, "error, wrong header size\n");
+ return -1;
+ }
+
+ version = AV_RB16(buf + 2);
+ av_dlog(avctx, "%.4s version %d\n", buf+4, version);
+ if (version != 0) {
+ av_log(avctx, AV_LOG_ERROR, "unsupported version: %d\n", version);
+ return -1;
+ }
+
+ width = AV_RB16(buf + 8);
+ height = AV_RB16(buf + 10);
+ if (width != avctx->width || height != avctx->height) {
+ av_log(avctx, AV_LOG_ERROR, "picture resolution change: %dx%d -> %dx%d\n",
+ avctx->width, avctx->height, width, height);
+ return -1;
+ }
+
+ ctx->frame_type = (buf[12] >> 2) & 3;
+
+ av_dlog(avctx, "frame type %d\n", ctx->frame_type);
+
+ if (ctx->frame_type == 0) {
+ scan = progressive_scan;
+ ctx->scan = ctx->progressive_scan; // permuted
+ } else {
+ scan = interlaced_scan;
+ ctx->scan = ctx->interlaced_scan; // permuted
+ ctx->frame.interlaced_frame = 1;
+ ctx->frame.top_field_first = ctx->frame_type == 1;
+ }
+
+ avctx->pix_fmt = PIX_FMT_YUV422P10;
+
+ ptr = buf + 20;
+ flags = buf[19];
+ av_dlog(avctx, "flags %x\n", flags);
+
+ if (flags & 2) {
+ permute(ctx->qmat_luma, scan, ptr);
+ ptr += 64;
+ } else {
+ memset(ctx->qmat_luma, 4, 64);
+ }
+
+ if (flags & 1) {
+ permute(ctx->qmat_chroma, scan, ptr);
+ } else {
+ memset(ctx->qmat_chroma, 4, 64);
+ }
+
+ return hdr_size;
+}
+
+static int decode_picture_header(AVCodecContext *avctx, const uint8_t *buf, const int buf_size)
+{
+ ProresContext *ctx = avctx->priv_data;
+ int i, hdr_size, slice_count;
+ unsigned pic_data_size;
+ int log2_slice_mb_width, log2_slice_mb_height;
+ int slice_mb_count, mb_x, mb_y;
+ const uint8_t *data_ptr, *index_ptr;
+
+ hdr_size = buf[0] >> 3;
+ if (hdr_size < 8 || hdr_size > buf_size) {
+ av_log(avctx, AV_LOG_ERROR, "error, wrong picture header size\n");
+ return -1;
+ }
+
+ pic_data_size = AV_RB32(buf + 1);
+ if (pic_data_size > buf_size) {
+ av_log(avctx, AV_LOG_ERROR, "error, wrong picture data size\n");
+ return -1;
+ }
+
+ log2_slice_mb_width = buf[7] >> 4;
+ log2_slice_mb_height = buf[7] & 0xF;
+ if (log2_slice_mb_width > 3 || log2_slice_mb_height) {
+ av_log(avctx, AV_LOG_ERROR, "unsupported slice resolution: %dx%d\n",
+ 1 << log2_slice_mb_width, 1 << log2_slice_mb_height);
+ return -1;
+ }
+
+ ctx->mb_width = (avctx->width + 15) >> 4;
+ ctx->mb_height = (avctx->height + 15) >> 4;
+
+ slice_count = AV_RB16(buf + 5);
+
+ if (ctx->slice_count != slice_count || !ctx->slices) {
+ av_freep(&ctx->slices);
+ ctx->slices = av_mallocz(slice_count * sizeof(*ctx->slices));
+ if (!ctx->slices)
+ return AVERROR(ENOMEM);
+ ctx->slice_count = slice_count;
+ }
+
+ if (!slice_count)
+ return AVERROR(EINVAL);
+
+ if (hdr_size + slice_count*2 > buf_size) {
+ av_log(avctx, AV_LOG_ERROR, "error, wrong slice count\n");
+ return -1;
+ }
+
+ // parse slice information
+ index_ptr = buf + hdr_size;
+ data_ptr = index_ptr + slice_count*2;
+
+ slice_mb_count = 1 << log2_slice_mb_width;
+ mb_x = 0;
+ mb_y = 0;
+
+ for (i = 0; i < slice_count; i++) {
+ SliceContext *slice = &ctx->slices[i];
+
+ slice->data = data_ptr;
+ data_ptr += AV_RB16(index_ptr + i*2);
+
+ while (ctx->mb_width - mb_x < slice_mb_count)
+ slice_mb_count >>= 1;
+
+ slice->mb_x = mb_x;
+ slice->mb_y = mb_y;
+ slice->mb_count = slice_mb_count;
+ slice->data_size = data_ptr - slice->data;
+
+ if (slice->data_size < 6) {
+ av_log(avctx, AV_LOG_ERROR, "error, wrong slice data size\n");
+ return -1;
+ }
+
+ mb_x += slice_mb_count;
+ if (mb_x == ctx->mb_width) {
+ slice_mb_count = 1 << log2_slice_mb_width;
+ mb_x = 0;
+ mb_y++;
+ }
+ if (data_ptr > buf + buf_size) {
+ av_log(avctx, AV_LOG_ERROR, "error, slice out of bounds\n");
+ return -1;
+ }
+ }
+
+ return pic_data_size;
+}
+
+#define DECODE_CODEWORD(val, codebook) \
+ do { \
+ unsigned int rice_order, exp_order, switch_bits; \
+ unsigned int q, buf, bits; \
+ \
+ UPDATE_CACHE(re, gb); \
+ buf = GET_CACHE(re, gb); \
+ \
+ /* number of bits to switch between rice and exp golomb */ \
+ switch_bits = codebook & 3; \
+ rice_order = codebook >> 5; \
+ exp_order = (codebook >> 2) & 7; \
+ \
+ q = 31-av_log2(buf); \
+ \
+ if (q > switch_bits) { /* exp golomb */ \
+ bits = exp_order - switch_bits + (q<<1); \
+ val = SHOW_UBITS(re, gb, bits) - (1 << exp_order) + \
+ ((switch_bits + 1) << rice_order); \
+ SKIP_BITS(re, gb, bits); \
+ } else if (rice_order) { \
+ SKIP_BITS(re, gb, q+1); \
+ val = (q << rice_order) + SHOW_UBITS(re, gb, rice_order); \
+ SKIP_BITS(re, gb, rice_order); \
+ } else { \
+ val = q; \
+ SKIP_BITS(re, gb, q+1); \
+ } \
+ } while (0); \
+
+#define TOSIGNED(x) (((x) >> 1) ^ (-((x) & 1)))
+
+#define FIRST_DC_CB 0xB8
+
+static const uint8_t dc_codebook[7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70};
+
+static av_always_inline void decode_dc_coeffs(GetBitContext *gb, DCTELEM *out,
+ int blocks_per_slice, const int *qmat)
+{
+ DCTELEM prev_dc;
+ int code, code2, i, sign;
+
+ OPEN_READER(re, gb);
+
+ DECODE_CODEWORD(code, FIRST_DC_CB);
+ prev_dc = TOSIGNED(code);
+ out[0] = 4096 + ((prev_dc * qmat[0]) >> 2);
+
+ out += 64; // dc coeff for the next block
+
+ code = 5;
+ sign = 0;
+ for (i = 1; i < blocks_per_slice; i++, out += 64) {
+ DECODE_CODEWORD(code, dc_codebook[FFMIN(code, 6)]);
+ if(code) sign ^= -(code & 1);
+ else sign = 0;
+ prev_dc += (((code + 1) >> 1) ^ sign) - sign;
+ out[0] = 4096 + ((prev_dc * qmat[0]) >> 2);
+ }
+ CLOSE_READER(re, gb);
+}
+
+// adaptive codebook switching lut according to previous run/level values
+static const uint8_t run_to_cb[16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29, 0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C };
+static const uint8_t lev_to_cb[10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28, 0x28, 0x28, 0x28, 0x4C };
+
+static av_always_inline void decode_ac_coeffs(AVCodecContext *avctx, GetBitContext *gb,
+ DCTELEM *out, int blocks_per_slice,
+ const int *qmat)
+{
+ ProresContext *ctx = avctx->priv_data;
+ int block_mask, sign;
+ unsigned pos, run, level;
+ int max_coeffs, i, bits_left;
+ int log2_block_count = av_log2(blocks_per_slice);
+
+ OPEN_READER(re, gb);
+
+ run = 4;
+ level = 2;
+
+ max_coeffs = 64 << log2_block_count;
+ block_mask = blocks_per_slice - 1;
+
+ for (pos = block_mask;;) {
+ bits_left = gb->size_in_bits - (((uint8_t*)re_buffer_ptr - gb->buffer)*8 - 32 + re_bit_count);
+ if (!bits_left || (bits_left < 32 && !SHOW_UBITS(re, gb, bits_left)))
+ break;
+
+ DECODE_CODEWORD(run, run_to_cb[FFMIN(run, 15)]);
+ pos += run + 1;
+ if (pos >= max_coeffs) {
+ av_log(avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", pos, max_coeffs);
+ return;
+ }
+
+ DECODE_CODEWORD(level, lev_to_cb[FFMIN(level, 9)]);
+ level += 1;
+
+ i = pos >> log2_block_count;
+
+ sign = SHOW_SBITS(re, gb, 1);
+ SKIP_BITS(re, gb, 1);
+ out[((pos & block_mask) << 6) + ctx->scan[i]] = (((level ^ sign) - sign) * qmat[i]) >> 2;
+ }
+
+ CLOSE_READER(re, gb);
+}
+
+static void decode_slice_luma(AVCodecContext *avctx, SliceContext *slice,
+ uint8_t *dst, int dst_stride,
+ const uint8_t *buf, unsigned buf_size,
+ const int *qmat)
+{
+ ProresContext *ctx = avctx->priv_data;
+ DECLARE_ALIGNED(16, DCTELEM, blocks)[8*4*64], *block;
+ GetBitContext gb;
+ int i, blocks_per_slice = slice->mb_count<<2;
+
+ for (i = 0; i < blocks_per_slice; i++)
+ ctx->dsp.clear_block(blocks+(i<<6));
+
+ init_get_bits(&gb, buf, buf_size << 3);
+
+ decode_dc_coeffs(&gb, blocks, blocks_per_slice, qmat);
+ decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice, qmat);
+
+ block = blocks;
+ for (i = 0; i < slice->mb_count; i++) {
+ ctx->idct_put(block+(0<<6), dst, dst_stride);
+ ctx->idct_put(block+(1<<6), dst+16, dst_stride);
+ ctx->idct_put(block+(2<<6), dst+8*dst_stride, dst_stride);
+ ctx->idct_put(block+(3<<6), dst+8*dst_stride+16, dst_stride);
+ block += 4*64;
+ dst += 32;
+ }
+}
+
+static void decode_slice_chroma(AVCodecContext *avctx, SliceContext *slice,
+ uint8_t *dst, int dst_stride,
+ const uint8_t *buf, unsigned buf_size,
+ const int *qmat)
+{
+ ProresContext *ctx = avctx->priv_data;
+ DECLARE_ALIGNED(16, DCTELEM, blocks)[8*4*64], *block;
+ GetBitContext gb;
+ int i, blocks_per_slice = slice->mb_count*2;
+
+ for (i = 0; i < blocks_per_slice; i++)
+ ctx->dsp.clear_block(blocks+(i<<6));
+
+ init_get_bits(&gb, buf, buf_size << 3);
+
+ decode_dc_coeffs(&gb, blocks, blocks_per_slice, qmat);
+ decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice, qmat);
+
+ block = blocks;
+ for (i = 0; i < slice->mb_count; i++) {
+ ctx->idct_put(block+(0<<6), dst, dst_stride);
+ ctx->idct_put(block+(1<<6), dst+8*dst_stride, dst_stride);
+ block += 2*64;
+ dst += 16;
+ }
+}
+
+static int decode_slice_thread(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
+{
+ ProresContext *ctx = avctx->priv_data;
+ SliceContext *slice = &ctx->slices[jobnr];
+ const uint8_t *buf = slice->data;
+ AVFrame *pic = avctx->coded_frame;
+ int i, hdr_size, qscale;
+ int luma_stride, chroma_stride;
+ int y_data_size, u_data_size, v_data_size;
+ uint8_t *dest_y, *dest_u, *dest_v;
+ int qmat_luma_scaled[64];
+ int qmat_chroma_scaled[64];
+
+ //av_log(avctx, AV_LOG_INFO, "slice %d mb width %d mb x %d y %d\n",
+ // jobnr, slice->mb_count, slice->mb_x, slice->mb_y);
+
+ // slice header
+ hdr_size = buf[0] >> 3;
+ qscale = av_clip(buf[1], 1, 224);
+ qscale = qscale > 128 ? qscale - 96 << 2: qscale;
+ y_data_size = AV_RB16(buf + 2);
+ u_data_size = AV_RB16(buf + 4);
+ v_data_size = slice->data_size - y_data_size - u_data_size - hdr_size;
+
+ if (y_data_size < 0 || u_data_size < 0 || v_data_size < 0) {
+ av_log(avctx, AV_LOG_ERROR, "invalid plane data size\n");
+ return -1;
+ }
+
+ buf += hdr_size;
+
+ for (i = 0; i < 64; i++) {
+ qmat_luma_scaled[i] = ctx->qmat_luma[i] * qscale;
+ qmat_chroma_scaled[i] = ctx->qmat_chroma[i] * qscale;
+ }
+
+ if (ctx->frame_type == 0) {
+ luma_stride = pic->linesize[0];
+ chroma_stride = pic->linesize[1];
+ } else {
+ luma_stride = pic->linesize[0] << 1;
+ chroma_stride = pic->linesize[1] << 1;
+ }
+
+ dest_y = pic->data[0] + (slice->mb_y << 4) * luma_stride + (slice->mb_x << 5);
+ dest_u = pic->data[1] + (slice->mb_y << 4) * chroma_stride + (slice->mb_x << 4);
+ dest_v = pic->data[2] + (slice->mb_y << 4) * chroma_stride + (slice->mb_x << 4);
+
+ if (ctx->frame_type && ctx->first_field ^ ctx->frame.top_field_first) {
+ dest_y += pic->linesize[0];
+ dest_u += pic->linesize[1];
+ dest_v += pic->linesize[2];
+ }
+
+ decode_slice_luma(avctx, slice, dest_y, luma_stride,
+ buf, y_data_size, qmat_luma_scaled);
+
+ if (!(avctx->flags & CODEC_FLAG_GRAY)) {
+ decode_slice_chroma(avctx, slice, dest_u, chroma_stride,
+ buf + y_data_size, u_data_size,
+ qmat_chroma_scaled);
+ decode_slice_chroma(avctx, slice, dest_v, chroma_stride,
+ buf + y_data_size + u_data_size, v_data_size,
+ qmat_chroma_scaled);
+ }
+
+ return 0;
+}
+
+static int decode_picture(AVCodecContext *avctx)
+{
+ ProresContext *ctx = avctx->priv_data;
+ int i, threads_ret[ctx->slice_count];
+
+ avctx->execute2(avctx, decode_slice_thread, NULL, threads_ret, ctx->slice_count);
+
+ for (i = 0; i < ctx->slice_count; i++)
+ if (threads_ret[i] < 0)
+ return threads_ret[i];
+
+ return 0;
+}
+
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
+ AVPacket *avpkt)
+{
+ ProresContext *ctx = avctx->priv_data;
+ AVFrame *frame = avctx->coded_frame;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ int frame_hdr_size, pic_size;
+
+ if (buf_size < 28 || buf_size != AV_RB32(buf) ||
+ AV_RL32(buf + 4) != AV_RL32("icpf")) {
+ av_log(avctx, AV_LOG_ERROR, "invalid frame header\n");
+ return -1;
+ }
+
+ ctx->first_field = 1;
+
+ buf += 8;
+ buf_size -= 8;
+
+ frame_hdr_size = decode_frame_header(ctx, buf, buf_size, avctx);
+ if (frame_hdr_size < 0)
+ return -1;
+
+ buf += frame_hdr_size;
+ buf_size -= frame_hdr_size;
+
+ decode_picture:
+ pic_size = decode_picture_header(avctx, buf, buf_size);
+ if (pic_size < 0) {
+ av_log(avctx, AV_LOG_ERROR, "error decoding picture header\n");
+ return -1;
+ }
+
+ if (frame->data[0])
+ avctx->release_buffer(avctx, frame);
+
+ if (avctx->get_buffer(avctx, frame) < 0)
+ return -1;
+
+ if (decode_picture(avctx)) {
+ av_log(avctx, AV_LOG_ERROR, "error decoding picture\n");
+ return -1;
+ }
+
+ buf += pic_size;
+ buf_size -= pic_size;
+
+ if (ctx->frame_type && buf_size > 0 && ctx->first_field) {
+ ctx->first_field = 0;
+ goto decode_picture;
+ }
+
+ *data_size = sizeof(AVFrame);
+ *(AVFrame*)data = *frame;
+
+ return avpkt->size;
+}
+
+static av_cold int decode_close(AVCodecContext *avctx)
+{
+ ProresContext *ctx = avctx->priv_data;
+
+ AVFrame *frame = avctx->coded_frame;
+ if (frame->data[0])
+ avctx->release_buffer(avctx, frame);
+ av_freep(&ctx->slices);
+
+ return 0;
+}
+
+AVCodec ff_prores_decoder = {
+ .name = "prores",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_PRORES,
+ .priv_data_size = sizeof(ProresContext),
+ .init = decode_init,
+ .close = decode_close,
+ .decode = decode_frame,
+ .long_name = NULL_IF_CONFIG_SMALL("ProRes"),
+ .capabilities = CODEC_CAP_SLICE_THREADS,
+};