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-rw-r--r--libavcodec/paf.c451
1 files changed, 451 insertions, 0 deletions
diff --git a/libavcodec/paf.c b/libavcodec/paf.c
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--- /dev/null
+++ b/libavcodec/paf.c
@@ -0,0 +1,451 @@
+/*
+ * Packed Animation File video and audio decoder
+ * Copyright (c) 2012 Paul B Mahol
+ *
+ * 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 "libavcodec/paf.h"
+#include "bytestream.h"
+#include "avcodec.h"
+#include "copy_block.h"
+#include "internal.h"
+
+
+static const uint8_t block_sequences[16][8] =
+{
+ { 0, 0, 0, 0, 0, 0, 0, 0 },
+ { 2, 0, 0, 0, 0, 0, 0, 0 },
+ { 5, 7, 0, 0, 0, 0, 0, 0 },
+ { 5, 0, 0, 0, 0, 0, 0, 0 },
+ { 6, 0, 0, 0, 0, 0, 0, 0 },
+ { 5, 7, 5, 7, 0, 0, 0, 0 },
+ { 5, 7, 5, 0, 0, 0, 0, 0 },
+ { 5, 7, 6, 0, 0, 0, 0, 0 },
+ { 5, 5, 0, 0, 0, 0, 0, 0 },
+ { 3, 0, 0, 0, 0, 0, 0, 0 },
+ { 6, 6, 0, 0, 0, 0, 0, 0 },
+ { 2, 4, 0, 0, 0, 0, 0, 0 },
+ { 2, 4, 5, 7, 0, 0, 0, 0 },
+ { 2, 4, 5, 0, 0, 0, 0, 0 },
+ { 2, 4, 6, 0, 0, 0, 0, 0 },
+ { 2, 4, 5, 7, 5, 7, 0, 0 }
+};
+
+typedef struct PAFVideoDecContext {
+ AVFrame *pic;
+ GetByteContext gb;
+
+ int current_frame;
+ uint8_t *frame[4];
+ int frame_size;
+ int video_size;
+
+ uint8_t *opcodes;
+} PAFVideoDecContext;
+
+static av_cold int paf_vid_close(AVCodecContext *avctx)
+{
+ PAFVideoDecContext *c = avctx->priv_data;
+ int i;
+
+ av_frame_free(&c->pic);
+
+ for (i = 0; i < 4; i++)
+ av_freep(&c->frame[i]);
+
+ return 0;
+}
+
+static av_cold int paf_vid_init(AVCodecContext *avctx)
+{
+ PAFVideoDecContext *c = avctx->priv_data;
+ int i;
+
+ if (avctx->height & 3 || avctx->width & 3) {
+ av_log(avctx, AV_LOG_ERROR, "width and height must be multiplies of 4\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ avctx->pix_fmt = AV_PIX_FMT_PAL8;
+
+ c->pic = av_frame_alloc();
+ if (!c->pic)
+ return AVERROR(ENOMEM);
+
+ c->frame_size = FFALIGN(avctx->height, 256) * avctx->width;
+ c->video_size = avctx->height * avctx->width;
+ for (i = 0; i < 4; i++) {
+ c->frame[i] = av_mallocz(c->frame_size);
+ if (!c->frame[i]) {
+ paf_vid_close(avctx);
+ return AVERROR(ENOMEM);
+ }
+ }
+
+ return 0;
+}
+
+static int get_video_page_offset(AVCodecContext *avctx, uint8_t a, uint8_t b)
+{
+ int x, y;
+
+ x = b & 0x7F;
+ y = ((a & 0x3F) << 1) | (b >> 7 & 1);
+
+ return y * 2 * avctx->width + x * 2;
+}
+
+static void copy4h(AVCodecContext *avctx, uint8_t *dst)
+{
+ PAFVideoDecContext *c = avctx->priv_data;
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ bytestream2_get_buffer(&c->gb, dst, 4);
+ dst += avctx->width;
+ }
+}
+
+static void copy_color_mask(AVCodecContext *avctx, uint8_t mask, uint8_t *dst, uint8_t color)
+{
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ if ((mask >> 4) & (1 << (3 - i)))
+ dst[i] = color;
+ if ((mask & 15) & (1 << (3 - i)))
+ dst[avctx->width + i] = color;
+ }
+}
+
+static void copy_src_mask(AVCodecContext *avctx, uint8_t mask, uint8_t *dst, const uint8_t *src)
+{
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ if ((mask >> 4) & (1 << (3 - i)))
+ dst[i] = src[i];
+ if ((mask & 15) & (1 << (3 - i)))
+ dst[avctx->width + i] = src[avctx->width + i];
+ }
+}
+
+static int decode_0(AVCodecContext *avctx, uint8_t code, uint8_t *pkt)
+{
+ PAFVideoDecContext *c = avctx->priv_data;
+ uint32_t opcode_size, offset;
+ uint8_t *dst, *dend, mask = 0, color = 0, a, b, p;
+ const uint8_t *src, *send, *opcodes;
+ int i, j, x = 0;
+
+ i = bytestream2_get_byte(&c->gb);
+ if (i) {
+ if (code & 0x10) {
+ int align;
+
+ align = bytestream2_tell(&c->gb) & 3;
+ if (align)
+ bytestream2_skip(&c->gb, 4 - align);
+ }
+ do {
+ a = bytestream2_get_byte(&c->gb);
+ b = bytestream2_get_byte(&c->gb);
+ p = (a & 0xC0) >> 6;
+ dst = c->frame[p] + get_video_page_offset(avctx, a, b);
+ dend = c->frame[p] + c->frame_size;
+ offset = (b & 0x7F) * 2;
+ j = bytestream2_get_le16(&c->gb) + offset;
+
+ do {
+ offset++;
+ if (dst + 3 * avctx->width + 4 > dend)
+ return AVERROR_INVALIDDATA;
+ copy4h(avctx, dst);
+ if ((offset & 0x3F) == 0)
+ dst += avctx->width * 3;
+ dst += 4;
+ } while (offset < j);
+ } while (--i);
+ }
+
+ dst = c->frame[c->current_frame];
+ dend = c->frame[c->current_frame] + c->frame_size;
+ do {
+ a = bytestream2_get_byte(&c->gb);
+ b = bytestream2_get_byte(&c->gb);
+ p = (a & 0xC0) >> 6;
+ src = c->frame[p] + get_video_page_offset(avctx, a, b);
+ send = c->frame[p] + c->frame_size;
+ if ((src + 3 * avctx->width + 4 > send) ||
+ (dst + 3 * avctx->width + 4 > dend))
+ return AVERROR_INVALIDDATA;
+ copy_block4(dst, src, avctx->width, avctx->width, 4);
+ i++;
+ if ((i & 0x3F) == 0)
+ dst += avctx->width * 3;
+ dst += 4;
+ } while (i < c->video_size / 16);
+
+ opcode_size = bytestream2_get_le16(&c->gb);
+ bytestream2_skip(&c->gb, 2);
+
+ if (bytestream2_get_bytes_left(&c->gb) < opcode_size)
+ return AVERROR_INVALIDDATA;
+
+ opcodes = pkt + bytestream2_tell(&c->gb);
+ bytestream2_skipu(&c->gb, opcode_size);
+
+ dst = c->frame[c->current_frame];
+
+ for (i = 0; i < avctx->height; i += 4, dst += avctx->width * 3) {
+ for (j = 0; j < avctx->width; j += 4, dst += 4) {
+ int opcode, k = 0;
+
+ if (x > opcode_size)
+ return AVERROR_INVALIDDATA;
+ if (j & 4) {
+ opcode = opcodes[x] & 15;
+ x++;
+ } else {
+ opcode = opcodes[x] >> 4;
+ }
+
+ while (block_sequences[opcode][k]) {
+
+ offset = avctx->width * 2;
+ code = block_sequences[opcode][k++];
+
+ switch (code) {
+ case 2:
+ offset = 0;
+ case 3:
+ color = bytestream2_get_byte(&c->gb);
+ case 4:
+ mask = bytestream2_get_byte(&c->gb);
+ copy_color_mask(avctx, mask, dst + offset, color);
+ break;
+ case 5:
+ offset = 0;
+ case 6:
+ a = bytestream2_get_byte(&c->gb);
+ b = bytestream2_get_byte(&c->gb);
+ p = (a & 0xC0) >> 6;
+ src = c->frame[p] + get_video_page_offset(avctx, a, b);
+ send = c->frame[p] + c->frame_size;
+ case 7:
+ if (src + offset + avctx->width + 4 > send)
+ return AVERROR_INVALIDDATA;
+ mask = bytestream2_get_byte(&c->gb);
+ copy_src_mask(avctx, mask, dst + offset, src + offset);
+ break;
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int paf_vid_decode(AVCodecContext *avctx, void *data,
+ int *got_frame, AVPacket *pkt)
+{
+ PAFVideoDecContext *c = avctx->priv_data;
+ uint8_t code, *dst, *src, *end;
+ int i, frame, ret;
+
+ if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
+ return ret;
+
+ bytestream2_init(&c->gb, pkt->data, pkt->size);
+
+ code = bytestream2_get_byte(&c->gb);
+ if (code & 0x20) {
+ for (i = 0; i < 4; i++)
+ memset(c->frame[i], 0, c->frame_size);
+
+ memset(c->pic->data[1], 0, AVPALETTE_SIZE);
+ c->current_frame = 0;
+ c->pic->key_frame = 1;
+ c->pic->pict_type = AV_PICTURE_TYPE_I;
+ } else {
+ c->pic->key_frame = 0;
+ c->pic->pict_type = AV_PICTURE_TYPE_P;
+ }
+
+ if (code & 0x40) {
+ uint32_t *out = (uint32_t *)c->pic->data[1];
+ int index, count;
+
+ index = bytestream2_get_byte(&c->gb);
+ count = bytestream2_get_byte(&c->gb) + 1;
+
+ if (index + count > 256)
+ return AVERROR_INVALIDDATA;
+ if (bytestream2_get_bytes_left(&c->gb) < 3*count)
+ return AVERROR_INVALIDDATA;
+
+ out += index;
+ for (i = 0; i < count; i++) {
+ unsigned r, g, b;
+
+ r = bytestream2_get_byteu(&c->gb);
+ r = r << 2 | r >> 4;
+ g = bytestream2_get_byteu(&c->gb);
+ g = g << 2 | g >> 4;
+ b = bytestream2_get_byteu(&c->gb);
+ b = b << 2 | b >> 4;
+ *out++ = 0xFFU << 24 | r << 16 | g << 8 | b;
+ }
+ c->pic->palette_has_changed = 1;
+ }
+
+ switch (code & 0x0F) {
+ case 0:
+ if ((ret = decode_0(avctx, code, pkt->data)) < 0)
+ return ret;
+ break;
+ case 1:
+ dst = c->frame[c->current_frame];
+ bytestream2_skip(&c->gb, 2);
+ if (bytestream2_get_bytes_left(&c->gb) < c->video_size)
+ return AVERROR_INVALIDDATA;
+ bytestream2_get_bufferu(&c->gb, dst, c->video_size);
+ break;
+ case 2:
+ frame = bytestream2_get_byte(&c->gb);
+ if (frame > 3)
+ return AVERROR_INVALIDDATA;
+ if (frame != c->current_frame)
+ memcpy(c->frame[c->current_frame], c->frame[frame], c->frame_size);
+ break;
+ case 4:
+ dst = c->frame[c->current_frame];
+ end = dst + c->video_size;
+
+ bytestream2_skip(&c->gb, 2);
+
+ while (dst < end) {
+ int8_t code;
+ int count;
+
+ if (bytestream2_get_bytes_left(&c->gb) < 2)
+ return AVERROR_INVALIDDATA;
+
+ code = bytestream2_get_byteu(&c->gb);
+ count = FFABS(code) + 1;
+
+ if (dst + count > end)
+ return AVERROR_INVALIDDATA;
+ if (code < 0)
+ memset(dst, bytestream2_get_byteu(&c->gb), count);
+ else
+ bytestream2_get_buffer(&c->gb, dst, count);
+ dst += count;
+ }
+ break;
+ default:
+ avpriv_request_sample(avctx, "unknown/invalid code");
+ return AVERROR_INVALIDDATA;
+ }
+
+ dst = c->pic->data[0];
+ src = c->frame[c->current_frame];
+ for (i = 0; i < avctx->height; i++) {
+ memcpy(dst, src, avctx->width);
+ dst += c->pic->linesize[0];
+ src += avctx->width;
+ }
+
+ c->current_frame = (c->current_frame + 1) & 3;
+ if ((ret = av_frame_ref(data, c->pic)) < 0)
+ return ret;
+
+ *got_frame = 1;
+
+ return pkt->size;
+}
+
+static av_cold int paf_aud_init(AVCodecContext *avctx)
+{
+ if (avctx->channels != 2) {
+ av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ avctx->channel_layout = AV_CH_LAYOUT_STEREO;
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+
+ return 0;
+}
+
+static int paf_aud_decode(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *pkt)
+{
+ AVFrame *frame = data;
+ uint8_t *buf = pkt->data;
+ int16_t *output_samples;
+ const uint8_t *t;
+ int frames, ret, i, j, k;
+
+ frames = pkt->size / PAF_SOUND_FRAME_SIZE;
+ if (frames < 1)
+ return AVERROR_INVALIDDATA;
+
+ frame->nb_samples = PAF_SOUND_SAMPLES * frames;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+ return ret;
+
+ output_samples = (int16_t *)frame->data[0];
+ for (i = 0; i < frames; i++) {
+ t = buf + 256 * sizeof(uint16_t);
+ for (j = 0; j < PAF_SOUND_SAMPLES; j++) {
+ for (k = 0; k < 2; k++) {
+ *output_samples++ = AV_RL16(buf + *t * 2);
+ t++;
+ }
+ }
+ buf += PAF_SOUND_FRAME_SIZE;
+ }
+
+ *got_frame_ptr = 1;
+
+ return pkt->size;
+}
+
+AVCodec ff_paf_video_decoder = {
+ .name = "paf_video",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_PAF_VIDEO,
+ .priv_data_size = sizeof(PAFVideoDecContext),
+ .init = paf_vid_init,
+ .close = paf_vid_close,
+ .decode = paf_vid_decode,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Video"),
+};
+
+AVCodec ff_paf_audio_decoder = {
+ .name = "paf_audio",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_PAF_AUDIO,
+ .init = paf_aud_init,
+ .decode = paf_aud_decode,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Audio"),
+};
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