mirror of https://github.com/FFmpeg/FFmpeg.git
Patch by Mohamed Naufal gmailify(naufal11). Originally committed as revision 22724 to svn://svn.ffmpeg.org/ffmpeg/trunkrelease/0.6
Mohamed Naufal
15 years ago
committed by
Stefano Sabatini
parent
30ad1a6651
commit
148bcae98c
9 changed files with 485 additions and 2 deletions
@ -0,0 +1,260 @@ |
||||
/**
|
||||
* @file libavcodec/yop.c |
||||
* Psygnosis YOP decoder |
||||
* |
||||
* Copyright (C) 2010 Mohamed Naufal Basheer <naufal11@gmail.com> |
||||
* derived from the code by |
||||
* Copyright (C) 2009 Thomas P. Higdon <thomas.p.higdon@gmail.com> |
||||
* |
||||
* 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 "avcodec.h" |
||||
#include "get_bits.h" |
||||
|
||||
typedef struct YopDecContext { |
||||
AVFrame frame; |
||||
AVCodecContext *avctx; |
||||
|
||||
int num_pal_colors; |
||||
int first_color[2]; |
||||
int frame_data_length; |
||||
int row_pos; |
||||
|
||||
uint8_t *low_nibble; |
||||
uint8_t *srcptr; |
||||
uint8_t *dstptr; |
||||
uint8_t *dstbuf; |
||||
} YopDecContext; |
||||
|
||||
// These tables are taken directly from:
|
||||
// http://wiki.multimedia.cx/index.php?title=Psygnosis_YOP
|
||||
|
||||
/**
|
||||
* Lookup table for painting macroblocks. Bytes 0-2 of each entry contain |
||||
* the macroblock positions to be painted (taken as (0, B0, B1, B2)). |
||||
* Byte 3 contains the number of bytes consumed on the input, |
||||
* equal to max(bytes 0-2) + 1. |
||||
*/ |
||||
static const uint8_t paint_lut[15][4] = |
||||
{{1, 2, 3, 4}, {1, 2, 0, 3}, |
||||
{1, 2, 1, 3}, {1, 2, 2, 3}, |
||||
{1, 0, 2, 3}, {1, 0, 0, 2}, |
||||
{1, 0, 1, 2}, {1, 1, 2, 3}, |
||||
{0, 1, 2, 3}, {0, 1, 0, 2}, |
||||
{1, 1, 0, 2}, {0, 1, 1, 2}, |
||||
{0, 0, 1, 2}, {0, 0, 0, 1}, |
||||
{1, 1, 1, 2}, |
||||
}; |
||||
|
||||
/**
|
||||
* Lookup table for copying macroblocks. Each entry contains the respective |
||||
* x and y pixel offset for the copy source. |
||||
*/ |
||||
static const int8_t motion_vector[16][2] = |
||||
{{-4, -4}, {-2, -4}, |
||||
{ 0, -4}, { 2, -4}, |
||||
{-4, -2}, {-4, 0}, |
||||
{-3, -3}, {-1, -3}, |
||||
{ 1, -3}, { 3, -3}, |
||||
{-3, -1}, {-2, -2}, |
||||
{ 0, -2}, { 2, -2}, |
||||
{ 4, -2}, {-2, 0}, |
||||
}; |
||||
|
||||
static av_cold int yop_decode_init(AVCodecContext *avctx) |
||||
{ |
||||
YopDecContext *s = avctx->priv_data; |
||||
s->avctx = avctx; |
||||
|
||||
if (avctx->width & 1 || avctx->height & 1 || |
||||
avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) { |
||||
av_log(avctx, AV_LOG_ERROR, "YOP has invalid dimensions\n"); |
||||
return -1; |
||||
} |
||||
|
||||
avctx->pix_fmt = PIX_FMT_PAL8; |
||||
|
||||
s->num_pal_colors = avctx->extradata[0]; |
||||
s->first_color[0] = avctx->extradata[1]; |
||||
s->first_color[1] = avctx->extradata[2]; |
||||
|
||||
if (s->num_pal_colors + s->first_color[0] > 256 || |
||||
s->num_pal_colors + s->first_color[1] > 256) { |
||||
av_log(avctx, AV_LOG_ERROR, |
||||
"YOP: palette parameters invalid, header probably corrupt\n"); |
||||
return AVERROR_INVALIDDATA; |
||||
} |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static av_cold int yop_decode_close(AVCodecContext *avctx) |
||||
{ |
||||
YopDecContext *s = avctx->priv_data; |
||||
if (s->frame.data[0]) |
||||
avctx->release_buffer(avctx, &s->frame); |
||||
return 0; |
||||
} |
||||
|
||||
/**
|
||||
* Paints a macroblock using the pattern in paint_lut. |
||||
* @param s codec context |
||||
* @param tag the tag that was in the nibble |
||||
*/ |
||||
static void yop_paint_block(YopDecContext *s, int tag) |
||||
{ |
||||
s->dstptr[0] = s->srcptr[0]; |
||||
s->dstptr[1] = s->srcptr[paint_lut[tag][0]]; |
||||
s->dstptr[s->frame.linesize[0]] = s->srcptr[paint_lut[tag][1]]; |
||||
s->dstptr[s->frame.linesize[0] + 1] = s->srcptr[paint_lut[tag][2]]; |
||||
|
||||
// The number of src bytes consumed is in the last part of the lut entry.
|
||||
s->srcptr += paint_lut[tag][3]; |
||||
} |
||||
|
||||
/**
|
||||
* Copies a previously painted macroblock to the current_block. |
||||
* @param copy_tag the tag that was in the nibble |
||||
*/ |
||||
static int yop_copy_previous_block(YopDecContext *s, int copy_tag) |
||||
{ |
||||
uint8_t *bufptr; |
||||
|
||||
// Calculate position for the copy source
|
||||
bufptr = s->dstptr + motion_vector[copy_tag][0] + |
||||
s->frame.linesize[0] * motion_vector[copy_tag][1]; |
||||
if (bufptr < s->dstbuf) { |
||||
av_log(s->avctx, AV_LOG_ERROR, |
||||
"YOP: cannot decode, file probably corrupt\n"); |
||||
return AVERROR_INVALIDDATA; |
||||
} |
||||
|
||||
s->dstptr[0] = bufptr[0]; |
||||
s->dstptr[1] = bufptr[1]; |
||||
s->dstptr[s->frame.linesize[0]] = bufptr[s->frame.linesize[0]]; |
||||
s->dstptr[s->frame.linesize[0] + 1] = bufptr[s->frame.linesize[0] + 1]; |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
/**
|
||||
* Returns the next nibble in sequence, consuming a new byte on the input |
||||
* only if necessary. |
||||
*/ |
||||
static uint8_t yop_get_next_nibble(YopDecContext *s) |
||||
{ |
||||
int ret; |
||||
|
||||
if (s->low_nibble) { |
||||
ret = *s->low_nibble & 0xf; |
||||
s->low_nibble = NULL; |
||||
}else { |
||||
s->low_nibble = s->srcptr++; |
||||
ret = *s->low_nibble >> 4; |
||||
} |
||||
return ret; |
||||
} |
||||
|
||||
/**
|
||||
* Takes s->dstptr to the next macroblock in sequence. |
||||
*/ |
||||
static void yop_next_macroblock(YopDecContext *s) |
||||
{ |
||||
// If we are advancing to the next row of macroblocks
|
||||
if (s->row_pos == s->frame.linesize[0] - 2) { |
||||
s->dstptr += s->frame.linesize[0]; |
||||
s->row_pos = 0; |
||||
}else { |
||||
s->row_pos += 2; |
||||
} |
||||
s->dstptr += 2; |
||||
} |
||||
|
||||
static int yop_decode_frame(AVCodecContext *avctx, void *data, int *data_size, |
||||
AVPacket *avpkt) |
||||
{ |
||||
YopDecContext *s = avctx->priv_data; |
||||
int tag, firstcolor, is_odd_frame; |
||||
int ret, i; |
||||
uint32_t *palette; |
||||
|
||||
if (s->frame.data[0]) |
||||
avctx->release_buffer(avctx, &s->frame); |
||||
|
||||
ret = avctx->get_buffer(avctx, &s->frame); |
||||
if (ret < 0) { |
||||
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
||||
return ret; |
||||
} |
||||
|
||||
s->frame.linesize[0] = avctx->width; |
||||
|
||||
s->dstbuf = s->frame.data[0]; |
||||
s->dstptr = s->frame.data[0]; |
||||
s->srcptr = avpkt->data + 4; |
||||
s->row_pos = 0; |
||||
s->low_nibble = NULL; |
||||
|
||||
is_odd_frame = avpkt->data[0]; |
||||
firstcolor = s->first_color[is_odd_frame]; |
||||
palette = (uint32_t *)s->frame.data[1]; |
||||
|
||||
for (i = 0; i < s->num_pal_colors; i++, s->srcptr += 3) |
||||
palette[i + firstcolor] = (s->srcptr[0] << 18) | |
||||
(s->srcptr[1] << 10) | |
||||
(s->srcptr[2] << 2); |
||||
|
||||
s->frame.palette_has_changed = 1; |
||||
|
||||
while (s->dstptr - s->dstbuf < |
||||
avctx->width * avctx->height && |
||||
s->srcptr - avpkt->data < avpkt->size) { |
||||
|
||||
tag = yop_get_next_nibble(s); |
||||
|
||||
if (tag != 0xf) { |
||||
yop_paint_block(s, tag); |
||||
}else { |
||||
tag = yop_get_next_nibble(s); |
||||
ret = yop_copy_previous_block(s, tag); |
||||
if (ret < 0) { |
||||
avctx->release_buffer(avctx, &s->frame); |
||||
return ret; |
||||
} |
||||
} |
||||
yop_next_macroblock(s); |
||||
} |
||||
|
||||
*data_size = sizeof(AVFrame); |
||||
*(AVFrame *) data = s->frame; |
||||
return avpkt->size; |
||||
} |
||||
|
||||
AVCodec yop_decoder = { |
||||
"yop", |
||||
CODEC_TYPE_VIDEO, |
||||
CODEC_ID_YOP, |
||||
sizeof(YopDecContext), |
||||
yop_decode_init, |
||||
NULL, |
||||
yop_decode_close, |
||||
yop_decode_frame, |
||||
.long_name = NULL_IF_CONFIG_SMALL("Psygnosis YOP Video"), |
||||
}; |
||||
@ -0,0 +1,216 @@ |
||||
/**
|
||||
* @file libavformat/yop.c |
||||
* Psygnosis YOP demuxer |
||||
* |
||||
* Copyright (C) 2010 Mohamed Naufal Basheer <naufal11@gmail.com> |
||||
* derived from the code by |
||||
* Copyright (C) 2009 Thomas P. Higdon <thomas.p.higdon@gmail.com> |
||||
* |
||||
* 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 "avformat.h" |
||||
|
||||
typedef struct yop_dec_context { |
||||
AVPacket video_packet; |
||||
|
||||
int odd_frame; |
||||
int frame_size; |
||||
int audio_block_length; |
||||
int palette_size; |
||||
} YopDecContext; |
||||
|
||||
static int yop_probe(AVProbeData *probe_packet) |
||||
{ |
||||
if (AV_RB16(probe_packet->buf) == AV_RB16("YO") && |
||||
probe_packet->buf[6] && |
||||
probe_packet->buf[7] && |
||||
!(probe_packet->buf[8] & 1) && |
||||
!(probe_packet->buf[10] & 1)) |
||||
return AVPROBE_SCORE_MAX * 3 / 4; |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int yop_read_header(AVFormatContext *s, AVFormatParameters *ap) |
||||
{ |
||||
YopDecContext *yop = s->priv_data; |
||||
ByteIOContext *pb = s->pb; |
||||
|
||||
AVCodecContext *audio_dec, *video_dec; |
||||
AVStream *audio_stream, *video_stream; |
||||
|
||||
int frame_rate, ret; |
||||
|
||||
audio_stream = av_new_stream(s, 0); |
||||
video_stream = av_new_stream(s, 1); |
||||
|
||||
// Extra data that will be passed to the decoder
|
||||
video_stream->codec->extradata_size = 8; |
||||
|
||||
video_stream->codec->extradata = av_mallocz(video_stream->codec->extradata_size + |
||||
FF_INPUT_BUFFER_PADDING_SIZE); |
||||
|
||||
if (!video_stream->codec->extradata) |
||||
return AVERROR(ENOMEM); |
||||
|
||||
// Audio
|
||||
audio_dec = audio_stream->codec; |
||||
audio_dec->codec_type = CODEC_TYPE_AUDIO; |
||||
audio_dec->codec_id = CODEC_ID_ADPCM_IMA_WS; |
||||
audio_dec->channels = 1; |
||||
audio_dec->sample_rate = 22050; |
||||
|
||||
// Video
|
||||
video_dec = video_stream->codec; |
||||
video_dec->codec_type = CODEC_TYPE_VIDEO; |
||||
video_dec->codec_id = CODEC_ID_YOP; |
||||
|
||||
url_fskip(pb, 6); |
||||
|
||||
frame_rate = get_byte(pb); |
||||
yop->frame_size = get_byte(pb) * 2048; |
||||
video_dec->width = get_le16(pb); |
||||
video_dec->height = get_le16(pb); |
||||
|
||||
video_stream->sample_aspect_ratio = (AVRational){1, 2}; |
||||
|
||||
ret = get_buffer(pb, video_dec->extradata, 8); |
||||
if (ret < 8) |
||||
return ret < 0 ? ret : AVERROR_EOF; |
||||
|
||||
yop->palette_size = video_dec->extradata[0] * 3 + 4; |
||||
yop->audio_block_length = AV_RL16(video_dec->extradata + 6); |
||||
|
||||
// 1840 samples per frame, 1 nibble per sample; hence 1840/2 = 920
|
||||
if (yop->audio_block_length < 920 || |
||||
yop->audio_block_length + yop->palette_size >= yop->frame_size) { |
||||
av_log(s, AV_LOG_ERROR, "YOP has invalid header\n"); |
||||
return AVERROR_INVALIDDATA; |
||||
} |
||||
|
||||
url_fseek(pb, 2048, SEEK_SET); |
||||
|
||||
av_set_pts_info(video_stream, 32, 1, frame_rate); |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int yop_read_packet(AVFormatContext *s, AVPacket *pkt) |
||||
{ |
||||
YopDecContext *yop = s->priv_data; |
||||
ByteIOContext *pb = s->pb; |
||||
|
||||
int ret; |
||||
int actual_video_data_size = yop->frame_size - |
||||
yop->audio_block_length - yop->palette_size; |
||||
|
||||
yop->video_packet.stream_index = 1; |
||||
|
||||
if (yop->video_packet.data) { |
||||
*pkt = yop->video_packet; |
||||
yop->video_packet.data = NULL; |
||||
yop->video_packet.size = 0; |
||||
pkt->data[0] = yop->odd_frame; |
||||
pkt->flags |= PKT_FLAG_KEY; |
||||
yop->odd_frame ^= 1; |
||||
return pkt->size; |
||||
} |
||||
ret = av_new_packet(&yop->video_packet, |
||||
yop->frame_size - yop->audio_block_length); |
||||
if (ret < 0) |
||||
return ret; |
||||
|
||||
yop->video_packet.pos = url_ftell(pb); |
||||
|
||||
ret = get_buffer(pb, yop->video_packet.data, yop->palette_size); |
||||
if (ret < 0) { |
||||
goto err_out; |
||||
}else if (ret < yop->palette_size) { |
||||
ret = AVERROR_EOF; |
||||
goto err_out; |
||||
} |
||||
|
||||
ret = av_get_packet(pb, pkt, 920); |
||||
if (ret < 0) |
||||
goto err_out; |
||||
|
||||
// Set position to the start of the frame
|
||||
pkt->pos = yop->video_packet.pos; |
||||
|
||||
url_fskip(pb, yop->audio_block_length - ret); |
||||
|
||||
ret = get_buffer(pb, yop->video_packet.data + yop->palette_size, |
||||
actual_video_data_size); |
||||
if (ret < 0) |
||||
goto err_out; |
||||
else if (ret < actual_video_data_size) |
||||
av_shrink_packet(&yop->video_packet, yop->palette_size + ret); |
||||
|
||||
// Arbitrarily return the audio data first
|
||||
return yop->audio_block_length; |
||||
|
||||
err_out: |
||||
av_free_packet(&yop->video_packet); |
||||
return ret; |
||||
} |
||||
|
||||
static int yop_read_close(AVFormatContext *s) |
||||
{ |
||||
YopDecContext *yop = s->priv_data; |
||||
av_free_packet(&yop->video_packet); |
||||
return 0; |
||||
} |
||||
|
||||
static int yop_read_seek(AVFormatContext *s, int stream_index, |
||||
int64_t timestamp, int flags) |
||||
{ |
||||
YopDecContext *yop = s->priv_data; |
||||
int64_t frame_pos, pos_min, pos_max; |
||||
int frame_count; |
||||
|
||||
av_free_packet(&yop->video_packet); |
||||
|
||||
if (!stream_index) |
||||
return -1; |
||||
|
||||
pos_min = s->data_offset; |
||||
pos_max = url_fsize(s->pb) - yop->frame_size; |
||||
frame_count = (pos_max - pos_min) / yop->frame_size; |
||||
|
||||
timestamp = FFMAX(0, FFMIN(frame_count, timestamp)); |
||||
|
||||
frame_pos = timestamp * yop->frame_size + pos_min; |
||||
yop->odd_frame = timestamp & 1; |
||||
|
||||
url_fseek(s->pb, frame_pos, SEEK_SET); |
||||
return 0; |
||||
} |
||||
|
||||
AVInputFormat yop_demuxer = { |
||||
"yop", |
||||
NULL_IF_CONFIG_SMALL("Psygnosis YOP Format"), |
||||
sizeof(YopDecContext), |
||||
yop_probe, |
||||
yop_read_header, |
||||
yop_read_packet, |
||||
yop_read_close, |
||||
yop_read_seek, |
||||
.extensions = "yop", |
||||
.flags = AVFMT_GENERIC_INDEX, |
||||
}; |
||||
Loading…
Reference in new issue