diff options
Diffstat (limited to 'ffmpeg1/libavcodec/proresdec_lgpl.c')
| -rw-r--r-- | ffmpeg1/libavcodec/proresdec_lgpl.c | 668 |
1 files changed, 0 insertions, 668 deletions
diff --git a/ffmpeg1/libavcodec/proresdec_lgpl.c b/ffmpeg1/libavcodec/proresdec_lgpl.c deleted file mode 100644 index 59c9843..0000000 --- a/ffmpeg1/libavcodec/proresdec_lgpl.c +++ /dev/null @@ -1,668 +0,0 @@ -/* - * Apple ProRes compatible decoder - * - * Copyright (c) 2010-2011 Maxim Poliakovski - * - * This file is part of Libav. - * - * Libav 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. - * - * Libav 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 Libav; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * This is a decoder for Apple ProRes 422 SD/HQ/LT/Proxy and ProRes 4444. - * It is used for storing and editing high definition video data in Apple's Final Cut Pro. - * - * @see http://wiki.multimedia.cx/index.php?title=Apple_ProRes - */ - -#define LONG_BITSTREAM_READER // some ProRes vlc codes require up to 28 bits to be read at once - -#include <stdint.h> - -#include "libavutil/intmath.h" -#include "avcodec.h" -#include "dsputil.h" -#include "internal.h" -#include "proresdata.h" -#include "proresdsp.h" -#include "get_bits.h" - -typedef struct { - const uint8_t *index; ///< pointers to the data of this slice - int slice_num; - int x_pos, y_pos; - int slice_width; - int prev_slice_sf; ///< scalefactor of the previous decoded slice - DECLARE_ALIGNED(16, int16_t, blocks)[8 * 4 * 64]; - DECLARE_ALIGNED(16, int16_t, qmat_luma_scaled)[64]; - DECLARE_ALIGNED(16, int16_t, qmat_chroma_scaled)[64]; -} ProresThreadData; - -typedef struct { - ProresDSPContext dsp; - AVFrame *frame; - ScanTable scantable; - int scantable_type; ///< -1 = uninitialized, 0 = progressive, 1/2 = interlaced - - int frame_type; ///< 0 = progressive, 1 = top-field first, 2 = bottom-field first - int pic_format; ///< 2 = 422, 3 = 444 - uint8_t qmat_luma[64]; ///< dequantization matrix for luma - uint8_t qmat_chroma[64]; ///< dequantization matrix for chroma - int qmat_changed; ///< 1 - global quantization matrices changed - int total_slices; ///< total number of slices in a picture - ProresThreadData *slice_data; - int pic_num; - int chroma_factor; - int mb_chroma_factor; - int num_chroma_blocks; ///< number of chrominance blocks in a macroblock - int num_x_slices; - int num_y_slices; - int slice_width_factor; - int slice_height_factor; - int num_x_mbs; - int num_y_mbs; - int alpha_info; -} ProresContext; - - -static av_cold int decode_init(AVCodecContext *avctx) -{ - ProresContext *ctx = avctx->priv_data; - - ctx->total_slices = 0; - ctx->slice_data = NULL; - - avctx->bits_per_raw_sample = PRORES_BITS_PER_SAMPLE; - ff_proresdsp_init(&ctx->dsp, avctx); - - ctx->scantable_type = -1; // set scantable type to uninitialized - memset(ctx->qmat_luma, 4, 64); - memset(ctx->qmat_chroma, 4, 64); - - return 0; -} - - -static int decode_frame_header(ProresContext *ctx, const uint8_t *buf, - const int data_size, AVCodecContext *avctx) -{ - int hdr_size, version, width, height, flags; - const uint8_t *ptr; - - hdr_size = AV_RB16(buf); - if (hdr_size > data_size) { - av_log(avctx, AV_LOG_ERROR, "frame data too small\n"); - return AVERROR_INVALIDDATA; - } - - version = AV_RB16(buf + 2); - if (version >= 2) { - av_log(avctx, AV_LOG_ERROR, - "unsupported header version: %d\n", version); - return AVERROR_INVALIDDATA; - } - - width = AV_RB16(buf + 8); - height = AV_RB16(buf + 10); - if (width != avctx->width || height != avctx->height) { - av_log(avctx, AV_LOG_ERROR, - "picture dimension changed: old: %d x %d, new: %d x %d\n", - avctx->width, avctx->height, width, height); - return AVERROR_INVALIDDATA; - } - - ctx->frame_type = (buf[12] >> 2) & 3; - if (ctx->frame_type > 2) { - av_log(avctx, AV_LOG_ERROR, - "unsupported frame type: %d\n", ctx->frame_type); - return AVERROR_INVALIDDATA; - } - - ctx->chroma_factor = (buf[12] >> 6) & 3; - ctx->mb_chroma_factor = ctx->chroma_factor + 2; - ctx->num_chroma_blocks = (1 << ctx->chroma_factor) >> 1; - switch (ctx->chroma_factor) { - case 2: - avctx->pix_fmt = AV_PIX_FMT_YUV422P10; - break; - case 3: - avctx->pix_fmt = AV_PIX_FMT_YUV444P10; - break; - default: - av_log(avctx, AV_LOG_ERROR, - "unsupported picture format: %d\n", ctx->pic_format); - return AVERROR_INVALIDDATA; - } - - if (ctx->scantable_type != ctx->frame_type) { - if (!ctx->frame_type) - ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, - ff_prores_progressive_scan); - else - ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, - ff_prores_interlaced_scan); - ctx->scantable_type = ctx->frame_type; - } - - if (ctx->frame_type) { /* if interlaced */ - ctx->frame->interlaced_frame = 1; - ctx->frame->top_field_first = ctx->frame_type & 1; - } else { - ctx->frame->interlaced_frame = 0; - } - - avctx->color_primaries = buf[14]; - avctx->color_trc = buf[15]; - avctx->colorspace = buf[16]; - - ctx->alpha_info = buf[17] & 0xf; - if (ctx->alpha_info) - avpriv_report_missing_feature(avctx, "Alpha channel"); - - ctx->qmat_changed = 0; - ptr = buf + 20; - flags = buf[19]; - if (flags & 2) { - if (ptr - buf > hdr_size - 64) { - av_log(avctx, AV_LOG_ERROR, "header data too small\n"); - return AVERROR_INVALIDDATA; - } - if (memcmp(ctx->qmat_luma, ptr, 64)) { - memcpy(ctx->qmat_luma, ptr, 64); - ctx->qmat_changed = 1; - } - ptr += 64; - } else { - memset(ctx->qmat_luma, 4, 64); - ctx->qmat_changed = 1; - } - - if (flags & 1) { - if (ptr - buf > hdr_size - 64) { - av_log(avctx, AV_LOG_ERROR, "header data too small\n"); - return -1; - } - if (memcmp(ctx->qmat_chroma, ptr, 64)) { - memcpy(ctx->qmat_chroma, ptr, 64); - ctx->qmat_changed = 1; - } - } else { - memset(ctx->qmat_chroma, 4, 64); - ctx->qmat_changed = 1; - } - - return hdr_size; -} - - -static int decode_picture_header(ProresContext *ctx, const uint8_t *buf, - const int data_size, AVCodecContext *avctx) -{ - int i, hdr_size, pic_data_size, num_slices; - int slice_width_factor, slice_height_factor; - int remainder, num_x_slices; - const uint8_t *data_ptr, *index_ptr; - - hdr_size = data_size > 0 ? buf[0] >> 3 : 0; - if (hdr_size < 8 || hdr_size > data_size) { - av_log(avctx, AV_LOG_ERROR, "picture header too small\n"); - return AVERROR_INVALIDDATA; - } - - pic_data_size = AV_RB32(buf + 1); - if (pic_data_size > data_size) { - av_log(avctx, AV_LOG_ERROR, "picture data too small\n"); - return AVERROR_INVALIDDATA; - } - - slice_width_factor = buf[7] >> 4; - slice_height_factor = buf[7] & 0xF; - if (slice_width_factor > 3 || slice_height_factor) { - av_log(avctx, AV_LOG_ERROR, - "unsupported slice dimension: %d x %d\n", - 1 << slice_width_factor, 1 << slice_height_factor); - return AVERROR_INVALIDDATA; - } - - ctx->slice_width_factor = slice_width_factor; - ctx->slice_height_factor = slice_height_factor; - - ctx->num_x_mbs = (avctx->width + 15) >> 4; - ctx->num_y_mbs = (avctx->height + - (1 << (4 + ctx->frame->interlaced_frame)) - 1) >> - (4 + ctx->frame->interlaced_frame); - - remainder = ctx->num_x_mbs & ((1 << slice_width_factor) - 1); - num_x_slices = (ctx->num_x_mbs >> slice_width_factor) + (remainder & 1) + - ((remainder >> 1) & 1) + ((remainder >> 2) & 1); - - num_slices = num_x_slices * ctx->num_y_mbs; - if (num_slices != AV_RB16(buf + 5)) { - av_log(avctx, AV_LOG_ERROR, "invalid number of slices\n"); - return AVERROR_INVALIDDATA; - } - - if (ctx->total_slices != num_slices) { - av_freep(&ctx->slice_data); - ctx->slice_data = av_malloc((num_slices + 1) * sizeof(ctx->slice_data[0])); - if (!ctx->slice_data) - return AVERROR(ENOMEM); - ctx->total_slices = num_slices; - } - - if (hdr_size + num_slices * 2 > data_size) { - av_log(avctx, AV_LOG_ERROR, "slice table too small\n"); - return AVERROR_INVALIDDATA; - } - - /* parse slice table allowing quick access to the slice data */ - index_ptr = buf + hdr_size; - data_ptr = index_ptr + num_slices * 2; - - for (i = 0; i < num_slices; i++) { - ctx->slice_data[i].index = data_ptr; - ctx->slice_data[i].prev_slice_sf = 0; - data_ptr += AV_RB16(index_ptr + i * 2); - } - ctx->slice_data[i].index = data_ptr; - ctx->slice_data[i].prev_slice_sf = 0; - - if (data_ptr > buf + data_size) { - av_log(avctx, AV_LOG_ERROR, "out of slice data\n"); - return -1; - } - - return pic_data_size; -} - - -/** - * Read an unsigned rice/exp golomb codeword. - */ -static inline int decode_vlc_codeword(GetBitContext *gb, unsigned codebook) -{ - unsigned int rice_order, exp_order, switch_bits; - unsigned int buf, code; - int log, prefix_len, len; - - OPEN_READER(re, gb); - UPDATE_CACHE(re, gb); - buf = GET_CACHE(re, gb); - - /* number of prefix bits to switch between Rice and expGolomb */ - switch_bits = (codebook & 3) + 1; - rice_order = codebook >> 5; /* rice code order */ - exp_order = (codebook >> 2) & 7; /* exp golomb code order */ - - log = 31 - av_log2(buf); /* count prefix bits (zeroes) */ - - if (log < switch_bits) { /* ok, we got a rice code */ - if (!rice_order) { - /* shortcut for faster decoding of rice codes without remainder */ - code = log; - LAST_SKIP_BITS(re, gb, log + 1); - } else { - prefix_len = log + 1; - code = (log << rice_order) + NEG_USR32(buf << prefix_len, rice_order); - LAST_SKIP_BITS(re, gb, prefix_len + rice_order); - } - } else { /* otherwise we got a exp golomb code */ - len = (log << 1) - switch_bits + exp_order + 1; - code = NEG_USR32(buf, len) - (1 << exp_order) + (switch_bits << rice_order); - LAST_SKIP_BITS(re, gb, len); - } - - CLOSE_READER(re, gb); - - return code; -} - -#define LSB2SIGN(x) (-((x) & 1)) -#define TOSIGNED(x) (((x) >> 1) ^ LSB2SIGN(x)) - -/** - * Decode DC coefficients for all blocks in a slice. - */ -static inline void decode_dc_coeffs(GetBitContext *gb, int16_t *out, - int nblocks) -{ - int16_t prev_dc; - int i, sign; - int16_t delta; - unsigned int code; - - code = decode_vlc_codeword(gb, FIRST_DC_CB); - out[0] = prev_dc = TOSIGNED(code); - - out += 64; /* move to the DC coeff of the next block */ - delta = 3; - - for (i = 1; i < nblocks; i++, out += 64) { - code = decode_vlc_codeword(gb, ff_prores_dc_codebook[FFMIN(FFABS(delta), 3)]); - - sign = -(((delta >> 15) & 1) ^ (code & 1)); - delta = (((code + 1) >> 1) ^ sign) - sign; - prev_dc += delta; - out[0] = prev_dc; - } -} - - -/** - * Decode AC coefficients for all blocks in a slice. - */ -static inline void decode_ac_coeffs(GetBitContext *gb, int16_t *out, - int blocks_per_slice, - int plane_size_factor, - const uint8_t *scan) -{ - int pos, block_mask, run, level, sign, run_cb_index, lev_cb_index; - int max_coeffs, bits_left; - - /* set initial prediction values */ - run = 4; - level = 2; - - max_coeffs = blocks_per_slice << 6; - block_mask = blocks_per_slice - 1; - - for (pos = blocks_per_slice - 1; pos < max_coeffs;) { - run_cb_index = ff_prores_run_to_cb_index[FFMIN(run, 15)]; - lev_cb_index = ff_prores_lev_to_cb_index[FFMIN(level, 9)]; - - bits_left = get_bits_left(gb); - if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left))) - return; - - run = decode_vlc_codeword(gb, ff_prores_ac_codebook[run_cb_index]); - - bits_left = get_bits_left(gb); - if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left))) - return; - - level = decode_vlc_codeword(gb, ff_prores_ac_codebook[lev_cb_index]) + 1; - - pos += run + 1; - if (pos >= max_coeffs) - break; - - sign = get_sbits(gb, 1); - out[((pos & block_mask) << 6) + scan[pos >> plane_size_factor]] = - (level ^ sign) - sign; - } -} - - -/** - * Decode a slice plane (luma or chroma). - */ -static void decode_slice_plane(ProresContext *ctx, ProresThreadData *td, - const uint8_t *buf, - int data_size, uint16_t *out_ptr, - int linesize, int mbs_per_slice, - int blocks_per_mb, int plane_size_factor, - const int16_t *qmat, int is_chroma) -{ - GetBitContext gb; - int16_t *block_ptr; - int mb_num, blocks_per_slice; - - blocks_per_slice = mbs_per_slice * blocks_per_mb; - - memset(td->blocks, 0, 8 * 4 * 64 * sizeof(*td->blocks)); - - init_get_bits(&gb, buf, data_size << 3); - - decode_dc_coeffs(&gb, td->blocks, blocks_per_slice); - - decode_ac_coeffs(&gb, td->blocks, blocks_per_slice, - plane_size_factor, ctx->scantable.permutated); - - /* inverse quantization, inverse transform and output */ - block_ptr = td->blocks; - - if (!is_chroma) { - for (mb_num = 0; mb_num < mbs_per_slice; mb_num++, out_ptr += blocks_per_mb * 4) { - ctx->dsp.idct_put(out_ptr, linesize, block_ptr, qmat); - block_ptr += 64; - if (blocks_per_mb > 2) { - ctx->dsp.idct_put(out_ptr + 8, linesize, block_ptr, qmat); - block_ptr += 64; - } - ctx->dsp.idct_put(out_ptr + linesize * 4, linesize, block_ptr, qmat); - block_ptr += 64; - if (blocks_per_mb > 2) { - ctx->dsp.idct_put(out_ptr + linesize * 4 + 8, linesize, block_ptr, qmat); - block_ptr += 64; - } - } - } else { - for (mb_num = 0; mb_num < mbs_per_slice; mb_num++, out_ptr += blocks_per_mb * 4) { - ctx->dsp.idct_put(out_ptr, linesize, block_ptr, qmat); - block_ptr += 64; - ctx->dsp.idct_put(out_ptr + linesize * 4, linesize, block_ptr, qmat); - block_ptr += 64; - if (blocks_per_mb > 2) { - ctx->dsp.idct_put(out_ptr + 8, linesize, block_ptr, qmat); - block_ptr += 64; - ctx->dsp.idct_put(out_ptr + linesize * 4 + 8, linesize, block_ptr, qmat); - block_ptr += 64; - } - } - } -} - - -static int decode_slice(AVCodecContext *avctx, void *tdata) -{ - ProresThreadData *td = tdata; - ProresContext *ctx = avctx->priv_data; - int mb_x_pos = td->x_pos; - int mb_y_pos = td->y_pos; - int pic_num = ctx->pic_num; - int slice_num = td->slice_num; - int mbs_per_slice = td->slice_width; - const uint8_t *buf; - uint8_t *y_data, *u_data, *v_data; - AVFrame *pic = ctx->frame; - int i, sf, slice_width_factor; - int slice_data_size, hdr_size, y_data_size, u_data_size, v_data_size; - int y_linesize, u_linesize, v_linesize; - - buf = ctx->slice_data[slice_num].index; - slice_data_size = ctx->slice_data[slice_num + 1].index - buf; - - slice_width_factor = av_log2(mbs_per_slice); - - y_data = pic->data[0]; - u_data = pic->data[1]; - v_data = pic->data[2]; - y_linesize = pic->linesize[0]; - u_linesize = pic->linesize[1]; - v_linesize = pic->linesize[2]; - - if (pic->interlaced_frame) { - if (!(pic_num ^ pic->top_field_first)) { - y_data += y_linesize; - u_data += u_linesize; - v_data += v_linesize; - } - y_linesize <<= 1; - u_linesize <<= 1; - v_linesize <<= 1; - } - - if (slice_data_size < 6) { - av_log(avctx, AV_LOG_ERROR, "slice data too small\n"); - return AVERROR_INVALIDDATA; - } - - /* parse slice header */ - hdr_size = buf[0] >> 3; - y_data_size = AV_RB16(buf + 2); - u_data_size = AV_RB16(buf + 4); - v_data_size = hdr_size > 7 ? AV_RB16(buf + 6) : - slice_data_size - y_data_size - u_data_size - hdr_size; - - if (hdr_size + y_data_size + u_data_size + v_data_size > slice_data_size || - v_data_size < 0 || hdr_size < 6) { - av_log(avctx, AV_LOG_ERROR, "invalid data size\n"); - return AVERROR_INVALIDDATA; - } - - sf = av_clip(buf[1], 1, 224); - sf = sf > 128 ? (sf - 96) << 2 : sf; - - /* scale quantization matrixes according with slice's scale factor */ - /* TODO: this can be SIMD-optimized a lot */ - if (ctx->qmat_changed || sf != td->prev_slice_sf) { - td->prev_slice_sf = sf; - for (i = 0; i < 64; i++) { - td->qmat_luma_scaled[ctx->dsp.idct_permutation[i]] = ctx->qmat_luma[i] * sf; - td->qmat_chroma_scaled[ctx->dsp.idct_permutation[i]] = ctx->qmat_chroma[i] * sf; - } - } - - /* decode luma plane */ - decode_slice_plane(ctx, td, buf + hdr_size, y_data_size, - (uint16_t*) (y_data + (mb_y_pos << 4) * y_linesize + - (mb_x_pos << 5)), y_linesize, - mbs_per_slice, 4, slice_width_factor + 2, - td->qmat_luma_scaled, 0); - - /* decode U chroma plane */ - decode_slice_plane(ctx, td, buf + hdr_size + y_data_size, u_data_size, - (uint16_t*) (u_data + (mb_y_pos << 4) * u_linesize + - (mb_x_pos << ctx->mb_chroma_factor)), - u_linesize, mbs_per_slice, ctx->num_chroma_blocks, - slice_width_factor + ctx->chroma_factor - 1, - td->qmat_chroma_scaled, 1); - - /* decode V chroma plane */ - decode_slice_plane(ctx, td, buf + hdr_size + y_data_size + u_data_size, - v_data_size, - (uint16_t*) (v_data + (mb_y_pos << 4) * v_linesize + - (mb_x_pos << ctx->mb_chroma_factor)), - v_linesize, mbs_per_slice, ctx->num_chroma_blocks, - slice_width_factor + ctx->chroma_factor - 1, - td->qmat_chroma_scaled, 1); - - return 0; -} - - -static int decode_picture(ProresContext *ctx, int pic_num, - AVCodecContext *avctx) -{ - int slice_num, slice_width, x_pos, y_pos; - - slice_num = 0; - - ctx->pic_num = pic_num; - for (y_pos = 0; y_pos < ctx->num_y_mbs; y_pos++) { - slice_width = 1 << ctx->slice_width_factor; - - for (x_pos = 0; x_pos < ctx->num_x_mbs && slice_width; - x_pos += slice_width) { - while (ctx->num_x_mbs - x_pos < slice_width) - slice_width >>= 1; - - ctx->slice_data[slice_num].slice_num = slice_num; - ctx->slice_data[slice_num].x_pos = x_pos; - ctx->slice_data[slice_num].y_pos = y_pos; - ctx->slice_data[slice_num].slice_width = slice_width; - - slice_num++; - } - } - - return avctx->execute(avctx, decode_slice, - ctx->slice_data, NULL, slice_num, - sizeof(ctx->slice_data[0])); -} - - -#define MOVE_DATA_PTR(nbytes) buf += (nbytes); buf_size -= (nbytes) - -static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, - AVPacket *avpkt) -{ - ProresContext *ctx = avctx->priv_data; - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - int frame_hdr_size, pic_num, pic_data_size; - - ctx->frame = data; - ctx->frame->pict_type = AV_PICTURE_TYPE_I; - ctx->frame->key_frame = 1; - - /* check frame atom container */ - if (buf_size < 28 || buf_size < AV_RB32(buf) || - AV_RB32(buf + 4) != FRAME_ID) { - av_log(avctx, AV_LOG_ERROR, "invalid frame\n"); - return AVERROR_INVALIDDATA; - } - - MOVE_DATA_PTR(8); - - frame_hdr_size = decode_frame_header(ctx, buf, buf_size, avctx); - if (frame_hdr_size < 0) - return AVERROR_INVALIDDATA; - - MOVE_DATA_PTR(frame_hdr_size); - - if (ff_get_buffer(avctx, ctx->frame, 0) < 0) - return -1; - - for (pic_num = 0; ctx->frame->interlaced_frame - pic_num + 1; pic_num++) { - pic_data_size = decode_picture_header(ctx, buf, buf_size, avctx); - if (pic_data_size < 0) - return AVERROR_INVALIDDATA; - - if (decode_picture(ctx, pic_num, avctx)) - return -1; - - MOVE_DATA_PTR(pic_data_size); - } - - ctx->frame = NULL; - *got_frame = 1; - - return avpkt->size; -} - - -static av_cold int decode_close(AVCodecContext *avctx) -{ - ProresContext *ctx = avctx->priv_data; - - av_freep(&ctx->slice_data); - - return 0; -} - - -AVCodec ff_prores_lgpl_decoder = { - .name = "prores_lgpl", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_PRORES, - .priv_data_size = sizeof(ProresContext), - .init = decode_init, - .close = decode_close, - .decode = decode_frame, - .capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS, - .long_name = NULL_IF_CONFIG_SMALL("Apple ProRes (iCodec Pro)") -}; |