Index: patched-ffmpeg-mt/libavcodec/iff.c |
=================================================================== |
--- patched-ffmpeg-mt/libavcodec/iff.c (revision 0) |
+++ patched-ffmpeg-mt/libavcodec/iff.c (revision 0) |
@@ -0,0 +1,242 @@ |
+/* |
+ * IFF PBM/ILBM bitmap decoder |
+ * Copyright (c) 2010 Peter Ross <pross@xvid.org> |
+ * |
+ * 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 |
+ */ |
+ |
+/** |
+ * @file libavcodec/iff.c |
+ * IFF PBM/ILBM bitmap decoder |
+ */ |
+ |
+#include "bytestream.h" |
+#include "avcodec.h" |
+#include "get_bits.h" |
+#include "iff.h" |
+ |
+typedef struct { |
+ AVFrame frame; |
+ int planesize; |
+ uint8_t * planebuf; |
+} IffContext; |
+ |
+/** |
+ * Convert CMAP buffer (stored in extradata) to lavc palette format |
+ */ |
+int ff_cmap_read_palette(AVCodecContext *avctx, uint32_t *pal) |
+{ |
+ int count, i; |
+ |
+ if (avctx->bits_per_coded_sample > 8) { |
+ av_log(avctx, AV_LOG_ERROR, "bit_per_coded_sample > 8 not supported\n"); |
+ return AVERROR_INVALIDDATA; |
+ } |
+ |
+ count = 1 << avctx->bits_per_coded_sample; |
+ if (avctx->extradata_size < count * 3) { |
+ av_log(avctx, AV_LOG_ERROR, "palette data underflow\n"); |
+ return AVERROR_INVALIDDATA; |
+ } |
+ for (i=0; i < count; i++) { |
+ pal[i] = 0xFF000000 | AV_RB24( avctx->extradata + i*3 ); |
+ } |
+ return 0; |
+} |
+ |
+static av_cold int decode_init(AVCodecContext *avctx) |
+{ |
+ IffContext *s = avctx->priv_data; |
+ |
+ if (avctx->bits_per_coded_sample <= 8) { |
+ avctx->pix_fmt = PIX_FMT_PAL8; |
+ } else if (avctx->bits_per_coded_sample <= 32) { |
+ avctx->pix_fmt = PIX_FMT_BGR32; |
+ } else { |
+ return AVERROR_INVALIDDATA; |
+ } |
+ |
+ s->planesize = avctx->width / 8; |
+ s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE); |
+ if (!s->planebuf) |
+ return AVERROR(ENOMEM); |
+ |
+ s->frame.reference = 1; |
+ if (avctx->get_buffer(avctx, &s->frame) < 0) { |
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
+ return AVERROR_UNKNOWN; |
+ } |
+ |
+ return avctx->bits_per_coded_sample <= 8 ? |
+ ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1]) : 0; |
+} |
+ |
+/** |
+ * Decode interleaved plane buffer |
+ * @param dst Destination buffer |
+ * @param buf Source buffer |
+ * @param buf_size |
+ * @param bps bits_per_coded_sample |
+ * @param plane plane number to decode as |
+ */ |
+#define DECLARE_DECODEPLANE(suffix, type) \ |
+static void decodeplane##suffix(void *dst, const uint8_t *const buf, int buf_size, int bps, int plane) \ |
+{ \ |
+ GetBitContext gb; \ |
+ int i, b; \ |
+ init_get_bits(&gb, buf, buf_size * 8); \ |
+ for(i = 0; i < (buf_size * 8 + bps - 1) / bps; i++) { \ |
+ for (b = 0; b < bps; b++) { \ |
+ ((type *)dst)[ i*bps + b ] |= get_bits1(&gb) << plane; \ |
+ } \ |
+ } \ |
+} |
+DECLARE_DECODEPLANE(8, uint8_t) |
+DECLARE_DECODEPLANE(32, uint32_t) |
+ |
+static int decode_frame_ilbm(AVCodecContext *avctx, |
+ void *data, int *data_size, |
+ AVPacket *avpkt) |
+{ |
+ IffContext *s = avctx->priv_data; |
+ const uint8_t *buf = avpkt->data; |
+ int buf_size = avpkt->size; |
+ const uint8_t *buf_end = buf+buf_size; |
+ int y, plane; |
+ |
+ if (avctx->reget_buffer(avctx, &s->frame) < 0){ |
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
+ return -1; |
+ } |
+ |
+ for(y = 0; y < avctx->height; y++ ) { |
+ uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ]; |
+ memset(row, 0, avctx->pix_fmt == PIX_FMT_PAL8 ? avctx->width : (avctx->width * 4)); |
+ for (plane = 0; plane < avctx->bits_per_coded_sample && buf < buf_end; plane++) { |
+ if (avctx->pix_fmt == PIX_FMT_PAL8) { |
+ decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), avctx->bits_per_coded_sample, plane); |
+ } else { // PIX_FMT_BGR32 |
+ decodeplane32(row, buf, FFMIN(s->planesize, buf_end - buf), avctx->bits_per_coded_sample, plane); |
+ } |
+ buf += s->planesize; |
+ } |
+ } |
+ |
+ *data_size = sizeof(AVFrame); |
+ *(AVFrame*)data = s->frame; |
+ return buf_size; |
+} |
+ |
+static int decode_frame_byterun1(AVCodecContext *avctx, |
+ void *data, int *data_size, |
+ AVPacket *avpkt) |
+{ |
+ IffContext *s = avctx->priv_data; |
+ const uint8_t *buf = avpkt->data; |
+ int buf_size = avpkt->size; |
+ const uint8_t *buf_end = buf+buf_size; |
+ int y, plane, x; |
+ |
+ if (avctx->reget_buffer(avctx, &s->frame) < 0){ |
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
+ return -1; |
+ } |
+ |
+ for(y = 0; y < avctx->height ; y++ ) { |
+ uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ]; |
+ if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved |
+ memset(row, 0, avctx->pix_fmt == PIX_FMT_PAL8 ? avctx->width : (avctx->width * 4)); |
+ for (plane = 0; plane < avctx->bits_per_coded_sample; plane++) { |
+ for(x = 0; x < s->planesize && buf < buf_end; ) { |
+ int8_t value = *buf++; |
+ int length; |
+ if (value >= 0) { |
+ length = value + 1; |
+ memcpy(s->planebuf + x, buf, FFMIN3(length, s->planesize - x, buf_end - buf)); |
+ buf += length; |
+ } else if (value > -128) { |
+ length = -value + 1; |
+ memset(s->planebuf + x, *buf++, FFMIN(length, s->planesize - x)); |
+ } else { //noop |
+ continue; |
+ } |
+ x += length; |
+ } |
+ if (avctx->pix_fmt == PIX_FMT_PAL8) { |
+ decodeplane8(row, s->planebuf, s->planesize, avctx->bits_per_coded_sample, plane); |
+ } else { //PIX_FMT_BGR32 |
+ decodeplane32(row, s->planebuf, s->planesize, avctx->bits_per_coded_sample, plane); |
+ } |
+ } |
+ } else { |
+ for(x = 0; x < avctx->width && buf < buf_end; ) { |
+ int8_t value = *buf++; |
+ int length; |
+ if (value >= 0) { |
+ length = value + 1; |
+ memcpy(row + x, buf, FFMIN3(length, buf_end - buf, avctx->width - x)); |
+ buf += length; |
+ } else if (value > -128) { |
+ length = -value + 1; |
+ memset(row + x, *buf++, FFMIN(length, avctx->width - x)); |
+ } else { //noop |
+ continue; |
+ } |
+ x += length; |
+ } |
+ } |
+ } |
+ |
+ *data_size = sizeof(AVFrame); |
+ *(AVFrame*)data = s->frame; |
+ return buf_size; |
+} |
+ |
+static av_cold int decode_end(AVCodecContext *avctx) |
+{ |
+ IffContext *s = avctx->priv_data; |
+ if (s->frame.data[0]) |
+ avctx->release_buffer(avctx, &s->frame); |
+ av_freep(&s->planebuf); |
+ return 0; |
+} |
+ |
+AVCodec iff_ilbm_decoder = { |
+ "iff_ilbm", |
+ CODEC_TYPE_VIDEO, |
+ CODEC_ID_IFF_ILBM, |
+ sizeof(IffContext), |
+ decode_init, |
+ NULL, |
+ decode_end, |
+ decode_frame_ilbm, |
+ CODEC_CAP_DR1, |
+ .long_name = NULL_IF_CONFIG_SMALL("IFF ILBM"), |
+}; |
+ |
+AVCodec iff_byterun1_decoder = { |
+ "iff_byterun1", |
+ CODEC_TYPE_VIDEO, |
+ CODEC_ID_IFF_BYTERUN1, |
+ sizeof(IffContext), |
+ decode_init, |
+ NULL, |
+ decode_end, |
+ decode_frame_byterun1, |
+ CODEC_CAP_DR1, |
+ .long_name = NULL_IF_CONFIG_SMALL("IFF ByteRun1"), |
+}; |