| /* | |
| * Canopus HQ/HQA decoder | |
| * | |
| * 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 <stdint.h> | |
| #include "libavutil/attributes.h" | |
| #include "libavutil/mem_internal.h" | |
| #include "libavutil/thread.h" | |
| #include "avcodec.h" | |
| #include "bytestream.h" | |
| #include "canopus.h" | |
| #include "codec_internal.h" | |
| #include "decode.h" | |
| #include "get_bits.h" | |
| #include "hq_hqadata.h" | |
| #include "hq_hqadsp.h" | |
| #include "vlc.h" | |
| /* HQ/HQA slices are a set of macroblocks belonging to a frame, and | |
| * they usually form a pseudorandom pattern (probably because it is | |
| * nicer to display on partial decode). | |
| * | |
| * For HQA it just happens that each slice is on every 8th macroblock, | |
| * but they can be on any frame width like | |
| * X.......X. | |
| * ......X... | |
| * ....X..... | |
| * ..X....... | |
| * etc. | |
| * | |
| * The original decoder has special handling for edge macroblocks, | |
| * while lavc simply aligns coded_width and coded_height. | |
| */ | |
| typedef struct HQContext { | |
| AVCodecContext *avctx; | |
| HQDSPContext hqhqadsp; | |
| DECLARE_ALIGNED(16, int16_t, block)[12][64]; | |
| } HQContext; | |
| static VLCElem hq_ac_vlc[1184]; | |
| static VLCElem hqa_cbp_vlc[32]; | |
| static inline void put_blocks(HQContext *c, AVFrame *pic, | |
| int plane, int x, int y, int ilace, | |
| int16_t *block0, int16_t *block1) | |
| { | |
| uint8_t *p = pic->data[plane] + x; | |
| c->hqhqadsp.idct_put(p + y * pic->linesize[plane], | |
| pic->linesize[plane] << ilace, block0); | |
| c->hqhqadsp.idct_put(p + (y + (ilace ? 1 : 8)) * pic->linesize[plane], | |
| pic->linesize[plane] << ilace, block1); | |
| } | |
| static int hq_decode_block(HQContext *c, GetBitContext *gb, int16_t block[64], | |
| int qsel, int is_chroma, int is_hqa) | |
| { | |
| const int32_t *q; | |
| int val, pos = 1; | |
| memset(block, 0, 64 * sizeof(*block)); | |
| if (!is_hqa) { | |
| block[0] = get_sbits(gb, 9) * 64; | |
| q = hq_quants[qsel][is_chroma][get_bits(gb, 2)]; | |
| } else { | |
| q = hq_quants[qsel][is_chroma][get_bits(gb, 2)]; | |
| block[0] = get_sbits(gb, 9) * 64; | |
| } | |
| for (;;) { | |
| val = get_vlc2(gb, hq_ac_vlc, 9, 2); | |
| if (val < 0) | |
| return AVERROR_INVALIDDATA; | |
| pos += hq_ac_skips[val]; | |
| if (pos >= 64) | |
| break; | |
| block[ff_zigzag_direct[pos]] = (int)(hq_ac_syms[val] * (unsigned)q[pos]) >> 12; | |
| pos++; | |
| } | |
| return 0; | |
| } | |
| static int hq_decode_mb(HQContext *c, AVFrame *pic, | |
| GetBitContext *gb, int x, int y) | |
| { | |
| int qgroup, flag; | |
| int i, ret; | |
| qgroup = get_bits(gb, 4); | |
| flag = get_bits1(gb); | |
| for (i = 0; i < 8; i++) { | |
| ret = hq_decode_block(c, gb, c->block[i], qgroup, i >= 4, 0); | |
| if (ret < 0) | |
| return ret; | |
| } | |
| put_blocks(c, pic, 0, x, y, flag, c->block[0], c->block[2]); | |
| put_blocks(c, pic, 0, x + 8, y, flag, c->block[1], c->block[3]); | |
| put_blocks(c, pic, 2, x >> 1, y, flag, c->block[4], c->block[5]); | |
| put_blocks(c, pic, 1, x >> 1, y, flag, c->block[6], c->block[7]); | |
| return 0; | |
| } | |
| static int hq_decode_frame(HQContext *ctx, AVFrame *pic, GetByteContext *gbc, | |
| int prof_num, size_t data_size) | |
| { | |
| const HQProfile *profile; | |
| GetBitContext gb; | |
| const uint8_t *perm, *src = gbc->buffer; | |
| uint32_t slice_off[21]; | |
| int slice, start_off, next_off, i, ret; | |
| if ((unsigned)prof_num >= NUM_HQ_PROFILES) { | |
| profile = &hq_profile[0]; | |
| avpriv_request_sample(ctx->avctx, "HQ Profile %d", prof_num); | |
| } else { | |
| profile = &hq_profile[prof_num]; | |
| av_log(ctx->avctx, AV_LOG_VERBOSE, "HQ Profile %d\n", prof_num); | |
| } | |
| ctx->avctx->coded_width = FFALIGN(profile->width, 16); | |
| ctx->avctx->coded_height = FFALIGN(profile->height, 16); | |
| ctx->avctx->width = profile->width; | |
| ctx->avctx->height = profile->height; | |
| ctx->avctx->bits_per_raw_sample = 8; | |
| ctx->avctx->pix_fmt = AV_PIX_FMT_YUV422P; | |
| ret = ff_get_buffer(ctx->avctx, pic, 0); | |
| if (ret < 0) | |
| return ret; | |
| /* Offsets are stored from CUV position, so adjust them accordingly. */ | |
| for (i = 0; i < profile->num_slices + 1; i++) | |
| slice_off[i] = bytestream2_get_be24(gbc) - 4; | |
| next_off = 0; | |
| for (slice = 0; slice < profile->num_slices; slice++) { | |
| start_off = next_off; | |
| next_off = profile->tab_h * (slice + 1) / profile->num_slices; | |
| perm = profile->perm_tab + start_off * profile->tab_w * 2; | |
| if (slice_off[slice] < (profile->num_slices + 1) * 3 || | |
| slice_off[slice] >= slice_off[slice + 1] || | |
| slice_off[slice + 1] > data_size) { | |
| av_log(ctx->avctx, AV_LOG_ERROR, | |
| "Invalid slice size %"SIZE_SPECIFIER".\n", data_size); | |
| break; | |
| } | |
| init_get_bits(&gb, src + slice_off[slice], | |
| (slice_off[slice + 1] - slice_off[slice]) * 8); | |
| for (i = 0; i < (next_off - start_off) * profile->tab_w; i++) { | |
| ret = hq_decode_mb(ctx, pic, &gb, perm[0] * 16, perm[1] * 16); | |
| if (ret < 0) { | |
| av_log(ctx->avctx, AV_LOG_ERROR, | |
| "Error decoding macroblock %d at slice %d.\n", i, slice); | |
| return ret; | |
| } | |
| perm += 2; | |
| } | |
| } | |
| return 0; | |
| } | |
| static int hqa_decode_mb(HQContext *c, AVFrame *pic, int qgroup, | |
| GetBitContext *gb, int x, int y) | |
| { | |
| int flag = 0; | |
| int i, ret, cbp; | |
| if (get_bits_left(gb) < 1) | |
| return AVERROR_INVALIDDATA; | |
| cbp = get_vlc2(gb, hqa_cbp_vlc, 5, 1); | |
| for (i = 0; i < 12; i++) | |
| memset(c->block[i], 0, sizeof(*c->block)); | |
| for (i = 0; i < 12; i++) | |
| c->block[i][0] = -128 * (1 << 6); | |
| if (cbp) { | |
| flag = get_bits1(gb); | |
| cbp |= cbp << 4; | |
| if (cbp & 0x3) | |
| cbp |= 0x500; | |
| if (cbp & 0xC) | |
| cbp |= 0xA00; | |
| for (i = 0; i < 12; i++) { | |
| if (!(cbp & (1 << i))) | |
| continue; | |
| ret = hq_decode_block(c, gb, c->block[i], qgroup, i >= 8, 1); | |
| if (ret < 0) | |
| return ret; | |
| } | |
| } | |
| put_blocks(c, pic, 3, x, y, flag, c->block[ 0], c->block[ 2]); | |
| put_blocks(c, pic, 3, x + 8, y, flag, c->block[ 1], c->block[ 3]); | |
| put_blocks(c, pic, 0, x, y, flag, c->block[ 4], c->block[ 6]); | |
| put_blocks(c, pic, 0, x + 8, y, flag, c->block[ 5], c->block[ 7]); | |
| put_blocks(c, pic, 2, x >> 1, y, flag, c->block[ 8], c->block[ 9]); | |
| put_blocks(c, pic, 1, x >> 1, y, flag, c->block[10], c->block[11]); | |
| return 0; | |
| } | |
| static int hqa_decode_slice(HQContext *ctx, AVFrame *pic, GetBitContext *gb, | |
| int quant, int slice_no, int w, int h) | |
| { | |
| int i, j, off; | |
| int ret; | |
| for (i = 0; i < h; i += 16) { | |
| off = (slice_no * 16 + i * 3) & 0x70; | |
| for (j = off; j < w; j += 128) { | |
| ret = hqa_decode_mb(ctx, pic, quant, gb, j, i); | |
| if (ret < 0) { | |
| av_log(ctx->avctx, AV_LOG_ERROR, | |
| "Error decoding macroblock at %dx%d.\n", i, j); | |
| return ret; | |
| } | |
| } | |
| } | |
| return 0; | |
| } | |
| static int hqa_decode_frame(HQContext *ctx, AVFrame *pic, GetByteContext *gbc, size_t data_size) | |
| { | |
| GetBitContext gb; | |
| const int num_slices = 8; | |
| uint32_t slice_off[9]; | |
| int i, slice, ret; | |
| int width, height, quant; | |
| const uint8_t *src = gbc->buffer; | |
| if (bytestream2_get_bytes_left(gbc) < 8 + 4*(num_slices + 1)) | |
| return AVERROR_INVALIDDATA; | |
| width = bytestream2_get_be16(gbc); | |
| height = bytestream2_get_be16(gbc); | |
| ret = ff_set_dimensions(ctx->avctx, width, height); | |
| if (ret < 0) | |
| return ret; | |
| ctx->avctx->coded_width = FFALIGN(width, 16); | |
| ctx->avctx->coded_height = FFALIGN(height, 16); | |
| ctx->avctx->bits_per_raw_sample = 8; | |
| ctx->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; | |
| av_log(ctx->avctx, AV_LOG_VERBOSE, "HQA Profile\n"); | |
| quant = bytestream2_get_byte(gbc); | |
| bytestream2_skip(gbc, 3); | |
| if (quant >= NUM_HQ_QUANTS) { | |
| av_log(ctx->avctx, AV_LOG_ERROR, | |
| "Invalid quantization matrix %d.\n", quant); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| ret = ff_get_buffer(ctx->avctx, pic, 0); | |
| if (ret < 0) | |
| return ret; | |
| /* Offsets are stored from HQA1 position, so adjust them accordingly. */ | |
| for (i = 0; i < num_slices + 1; i++) | |
| slice_off[i] = bytestream2_get_be32(gbc) - 4; | |
| for (slice = 0; slice < num_slices; slice++) { | |
| if (slice_off[slice] < (num_slices + 1) * 3 || | |
| slice_off[slice] >= slice_off[slice + 1] || | |
| slice_off[slice + 1] > data_size) { | |
| av_log(ctx->avctx, AV_LOG_ERROR, | |
| "Invalid slice size %"SIZE_SPECIFIER".\n", data_size); | |
| break; | |
| } | |
| init_get_bits(&gb, src + slice_off[slice], | |
| (slice_off[slice + 1] - slice_off[slice]) * 8); | |
| ret = hqa_decode_slice(ctx, pic, &gb, quant, slice, width, height); | |
| if (ret < 0) | |
| return ret; | |
| } | |
| return 0; | |
| } | |
| static int hq_hqa_decode_frame(AVCodecContext *avctx, AVFrame *pic, | |
| int *got_frame, AVPacket *avpkt) | |
| { | |
| HQContext *ctx = avctx->priv_data; | |
| GetByteContext gbc0, *const gbc = &gbc0; | |
| uint32_t info_tag; | |
| unsigned int data_size; | |
| int ret; | |
| unsigned tag; | |
| bytestream2_init(gbc, avpkt->data, avpkt->size); | |
| if (bytestream2_get_bytes_left(gbc) < 4 + 4) { | |
| av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n", avpkt->size); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| info_tag = bytestream2_peek_le32(gbc); | |
| if (info_tag == MKTAG('I', 'N', 'F', 'O')) { | |
| int info_size; | |
| bytestream2_skip(gbc, 4); | |
| info_size = bytestream2_get_le32(gbc); | |
| if (info_size < 0 || bytestream2_get_bytes_left(gbc) < info_size) { | |
| av_log(avctx, AV_LOG_ERROR, "Invalid INFO size (%d).\n", info_size); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| ff_canopus_parse_info_tag(avctx, gbc->buffer, info_size); | |
| bytestream2_skip(gbc, info_size); | |
| } | |
| data_size = bytestream2_get_bytes_left(gbc); | |
| if (data_size < 4) { | |
| av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n", data_size); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| /* HQ defines dimensions and number of slices, and thus slice traversal | |
| * order. HQA has no size constraint and a fixed number of slices, so it | |
| * needs a separate scheme for it. */ | |
| tag = bytestream2_get_le32(gbc); | |
| if ((tag & 0x00FFFFFF) == (MKTAG('U', 'V', 'C', ' ') & 0x00FFFFFF)) { | |
| ret = hq_decode_frame(ctx, pic, gbc, tag >> 24, data_size); | |
| } else if (tag == MKTAG('H', 'Q', 'A', '1')) { | |
| ret = hqa_decode_frame(ctx, pic, gbc, data_size); | |
| } else { | |
| av_log(avctx, AV_LOG_ERROR, "Not a HQ/HQA frame.\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if (ret < 0) { | |
| av_log(avctx, AV_LOG_ERROR, "Error decoding frame.\n"); | |
| return ret; | |
| } | |
| pic->flags |= AV_FRAME_FLAG_KEY; | |
| pic->pict_type = AV_PICTURE_TYPE_I; | |
| *got_frame = 1; | |
| return avpkt->size; | |
| } | |
| static av_cold void hq_init_vlcs(void) | |
| { | |
| VLC_INIT_STATIC_TABLE(hqa_cbp_vlc, 5, FF_ARRAY_ELEMS(cbp_vlc_lens), | |
| cbp_vlc_lens, 1, 1, cbp_vlc_bits, 1, 1, 0); | |
| VLC_INIT_STATIC_TABLE(hq_ac_vlc, 9, NUM_HQ_AC_ENTRIES, | |
| hq_ac_bits, 1, 1, hq_ac_codes, 2, 2, 0); | |
| } | |
| static av_cold int hq_hqa_decode_init(AVCodecContext *avctx) | |
| { | |
| static AVOnce init_static_once = AV_ONCE_INIT; | |
| HQContext *ctx = avctx->priv_data; | |
| ctx->avctx = avctx; | |
| ff_hqdsp_init(&ctx->hqhqadsp); | |
| ff_thread_once(&init_static_once, hq_init_vlcs); | |
| return 0; | |
| } | |
| const FFCodec ff_hq_hqa_decoder = { | |
| .p.name = "hq_hqa", | |
| CODEC_LONG_NAME("Canopus HQ/HQA"), | |
| .p.type = AVMEDIA_TYPE_VIDEO, | |
| .p.id = AV_CODEC_ID_HQ_HQA, | |
| .priv_data_size = sizeof(HQContext), | |
| .init = hq_hqa_decode_init, | |
| FF_CODEC_DECODE_CB(hq_hqa_decode_frame), | |
| .p.capabilities = AV_CODEC_CAP_DR1, | |
| }; |