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Diffstat (limited to 'ffmpeg1/libavcodec/cllc.c')
-rw-r--r--ffmpeg1/libavcodec/cllc.c398
1 files changed, 0 insertions, 398 deletions
diff --git a/ffmpeg1/libavcodec/cllc.c b/ffmpeg1/libavcodec/cllc.c
deleted file mode 100644
index 6378c79..0000000
--- a/ffmpeg1/libavcodec/cllc.c
+++ /dev/null
@@ -1,398 +0,0 @@
-/*
- * Canopus Lossless Codec decoder
- *
- * Copyright (c) 2012 Derek Buitenhuis
- *
- * 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 "libavutil/intreadwrite.h"
-#include "dsputil.h"
-#include "get_bits.h"
-#include "avcodec.h"
-#include "internal.h"
-
-typedef struct CLLCContext {
- DSPContext dsp;
- AVCodecContext *avctx;
-
- uint8_t *swapped_buf;
- int swapped_buf_size;
-} CLLCContext;
-
-static int read_code_table(CLLCContext *ctx, GetBitContext *gb, VLC *vlc)
-{
- uint8_t symbols[256];
- uint8_t bits[256];
- uint16_t codes[256];
- int num_lens, num_codes, num_codes_sum, prefix;
- int i, j, count;
-
- prefix = 0;
- count = 0;
- num_codes_sum = 0;
-
- num_lens = get_bits(gb, 5);
-
- for (i = 0; i < num_lens; i++) {
- num_codes = get_bits(gb, 9);
- num_codes_sum += num_codes;
-
- if (num_codes_sum > 256) {
- vlc->table = NULL;
-
- av_log(ctx->avctx, AV_LOG_ERROR,
- "Too many VLCs (%d) to be read.\n", num_codes_sum);
- return AVERROR_INVALIDDATA;
- }
-
- for (j = 0; j < num_codes; j++) {
- symbols[count] = get_bits(gb, 8);
- bits[count] = i + 1;
- codes[count] = prefix++;
-
- count++;
- }
-
- prefix <<= 1;
- }
-
- return ff_init_vlc_sparse(vlc, 7, count, bits, 1, 1,
- codes, 2, 2, symbols, 1, 1, 0);
-}
-
-/*
- * Unlike the RGB24 read/restore, which reads in a component at a time,
- * ARGB read/restore reads in ARGB quads.
- */
-static int read_argb_line(CLLCContext *ctx, GetBitContext *gb, int *top_left,
- VLC *vlc, uint8_t *outbuf)
-{
- uint8_t *dst;
- int pred[4];
- int code;
- int i;
-
- OPEN_READER(bits, gb);
-
- dst = outbuf;
- pred[0] = top_left[0];
- pred[1] = top_left[1];
- pred[2] = top_left[2];
- pred[3] = top_left[3];
-
- for (i = 0; i < ctx->avctx->width; i++) {
- /* Always get the alpha component */
- UPDATE_CACHE(bits, gb);
- GET_VLC(code, bits, gb, vlc[0].table, 7, 2);
-
- pred[0] += code;
- dst[0] = pred[0];
-
- /* Skip the components if they are entirely transparent */
- if (dst[0]) {
- /* Red */
- UPDATE_CACHE(bits, gb);
- GET_VLC(code, bits, gb, vlc[1].table, 7, 2);
-
- pred[1] += code;
- dst[1] = pred[1];
-
- /* Green */
- UPDATE_CACHE(bits, gb);
- GET_VLC(code, bits, gb, vlc[2].table, 7, 2);
-
- pred[2] += code;
- dst[2] = pred[2];
-
- /* Blue */
- UPDATE_CACHE(bits, gb);
- GET_VLC(code, bits, gb, vlc[3].table, 7, 2);
-
- pred[3] += code;
- dst[3] = pred[3];
- } else {
- dst[1] = 0;
- dst[2] = 0;
- dst[3] = 0;
- }
-
- dst += 4;
- }
-
- CLOSE_READER(bits, gb);
-
- dst -= 4 * ctx->avctx->width;
- top_left[0] = dst[0];
-
- /* Only stash components if they are not transparent */
- if (top_left[0]) {
- top_left[1] = dst[1];
- top_left[2] = dst[2];
- top_left[3] = dst[3];
- }
-
- return 0;
-}
-
-static int read_rgb24_component_line(CLLCContext *ctx, GetBitContext *gb,
- int *top_left, VLC *vlc, uint8_t *outbuf)
-{
- uint8_t *dst;
- int pred, code;
- int i;
-
- OPEN_READER(bits, gb);
-
- dst = outbuf;
- pred = *top_left;
-
- /* Simultaneously read and restore the line */
- for (i = 0; i < ctx->avctx->width; i++) {
- UPDATE_CACHE(bits, gb);
- GET_VLC(code, bits, gb, vlc->table, 7, 2);
-
- pred += code;
- dst[0] = pred;
- dst += 3;
- }
-
- CLOSE_READER(bits, gb);
-
- /* Stash the first pixel */
- *top_left = dst[-3 * ctx->avctx->width];
-
- return 0;
-}
-
-static int decode_argb_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
-{
- AVCodecContext *avctx = ctx->avctx;
- uint8_t *dst;
- int pred[4];
- int ret;
- int i, j;
- VLC vlc[4];
-
- pred[0] = 0;
- pred[1] = 0x80;
- pred[2] = 0x80;
- pred[3] = 0x80;
-
- dst = pic->data[0];
-
- skip_bits(gb, 16);
-
- /* Read in code table for each plane */
- for (i = 0; i < 4; i++) {
- ret = read_code_table(ctx, gb, &vlc[i]);
- if (ret < 0) {
- for (j = 0; j <= i; j++)
- ff_free_vlc(&vlc[j]);
-
- av_log(ctx->avctx, AV_LOG_ERROR,
- "Could not read code table %d.\n", i);
- return ret;
- }
- }
-
- /* Read in and restore every line */
- for (i = 0; i < avctx->height; i++) {
- read_argb_line(ctx, gb, pred, vlc, dst);
-
- dst += pic->linesize[0];
- }
-
- for (i = 0; i < 4; i++)
- ff_free_vlc(&vlc[i]);
-
- return 0;
-}
-
-static int decode_rgb24_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
-{
- AVCodecContext *avctx = ctx->avctx;
- uint8_t *dst;
- int pred[3];
- int ret;
- int i, j;
- VLC vlc[3];
-
- pred[0] = 0x80;
- pred[1] = 0x80;
- pred[2] = 0x80;
-
- dst = pic->data[0];
-
- skip_bits(gb, 16);
-
- /* Read in code table for each plane */
- for (i = 0; i < 3; i++) {
- ret = read_code_table(ctx, gb, &vlc[i]);
- if (ret < 0) {
- for (j = 0; j <= i; j++)
- ff_free_vlc(&vlc[j]);
-
- av_log(ctx->avctx, AV_LOG_ERROR,
- "Could not read code table %d.\n", i);
- return ret;
- }
- }
-
- /* Read in and restore every line */
- for (i = 0; i < avctx->height; i++) {
- for (j = 0; j < 3; j++)
- read_rgb24_component_line(ctx, gb, &pred[j], &vlc[j], &dst[j]);
-
- dst += pic->linesize[0];
- }
-
- for (i = 0; i < 3; i++)
- ff_free_vlc(&vlc[i]);
-
- return 0;
-}
-
-static int cllc_decode_frame(AVCodecContext *avctx, void *data,
- int *got_picture_ptr, AVPacket *avpkt)
-{
- CLLCContext *ctx = avctx->priv_data;
- AVFrame *pic = data;
- uint8_t *src = avpkt->data;
- uint32_t info_tag, info_offset;
- int data_size;
- GetBitContext gb;
- int coding_type, ret;
-
- /* Skip the INFO header if present */
- info_offset = 0;
- info_tag = AV_RL32(src);
- if (info_tag == MKTAG('I', 'N', 'F', 'O')) {
- info_offset = AV_RL32(src + 4);
- if (info_offset > UINT32_MAX - 8 || info_offset + 8 > avpkt->size) {
- av_log(avctx, AV_LOG_ERROR,
- "Invalid INFO header offset: 0x%08X is too large.\n",
- info_offset);
- return AVERROR_INVALIDDATA;
- }
-
- info_offset += 8;
- src += info_offset;
-
- av_log(avctx, AV_LOG_DEBUG, "Skipping INFO chunk.\n");
- }
-
- data_size = (avpkt->size - info_offset) & ~1;
-
- /* Make sure our bswap16'd buffer is big enough */
- av_fast_padded_malloc(&ctx->swapped_buf,
- &ctx->swapped_buf_size, data_size);
- if (!ctx->swapped_buf) {
- av_log(avctx, AV_LOG_ERROR, "Could not allocate swapped buffer.\n");
- return AVERROR(ENOMEM);
- }
-
- /* bswap16 the buffer since CLLC's bitreader works in 16-bit words */
- ctx->dsp.bswap16_buf((uint16_t *) ctx->swapped_buf, (uint16_t *) src,
- data_size / 2);
-
- init_get_bits(&gb, ctx->swapped_buf, data_size * 8);
-
- /*
- * Read in coding type. The types are as follows:
- *
- * 0 - YUY2
- * 1 - BGR24 (Triples)
- * 2 - BGR24 (Quads)
- * 3 - BGRA
- */
- coding_type = (AV_RL32(src) >> 8) & 0xFF;
- av_log(avctx, AV_LOG_DEBUG, "Frame coding type: %d\n", coding_type);
-
- switch (coding_type) {
- case 1:
- case 2:
- avctx->pix_fmt = AV_PIX_FMT_RGB24;
- avctx->bits_per_raw_sample = 8;
-
- if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
- return ret;
-
- ret = decode_rgb24_frame(ctx, &gb, pic);
- if (ret < 0)
- return ret;
-
- break;
- case 3:
- avctx->pix_fmt = AV_PIX_FMT_ARGB;
- avctx->bits_per_raw_sample = 8;
-
- if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
- return ret;
-
- ret = decode_argb_frame(ctx, &gb, pic);
- if (ret < 0)
- return ret;
-
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unknown coding type: %d.\n", coding_type);
- return AVERROR_INVALIDDATA;
- }
-
- pic->key_frame = 1;
- pic->pict_type = AV_PICTURE_TYPE_I;
-
- *got_picture_ptr = 1;
-
- return avpkt->size;
-}
-
-static av_cold int cllc_decode_close(AVCodecContext *avctx)
-{
- CLLCContext *ctx = avctx->priv_data;
-
- av_freep(&ctx->swapped_buf);
-
- return 0;
-}
-
-static av_cold int cllc_decode_init(AVCodecContext *avctx)
-{
- CLLCContext *ctx = avctx->priv_data;
-
- /* Initialize various context values */
- ctx->avctx = avctx;
- ctx->swapped_buf = NULL;
- ctx->swapped_buf_size = 0;
-
- ff_dsputil_init(&ctx->dsp, avctx);
-
- return 0;
-}
-
-AVCodec ff_cllc_decoder = {
- .name = "cllc",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_CLLC,
- .priv_data_size = sizeof(CLLCContext),
- .init = cllc_decode_init,
- .decode = cllc_decode_frame,
- .close = cllc_decode_close,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Canopus Lossless Codec"),
-};
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