/*
- * Id Quake II CIN File Demuxer
+ * id Quake II CIN File Demuxer
* Copyright (c) 2003 The ffmpeg Project
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file idcin.c
- * Id Quake II CIN file demuxer by Mike Melanson (melanson@pcisys.net)
- * For more information about the Id CIN format, visit:
+ * @file
+ * id Quake II CIN file demuxer by Mike Melanson (melanson@pcisys.net)
+ * For more information about the id CIN format, visit:
* http://www.csse.monash.edu.au/~timf/
*
* CIN is a somewhat quirky and ill-defined format. Here are some notes
* audio frame #2: 787 * (bytes/sample) * (# channels) bytes in frame
* audio frame #3: 788 * (bytes/sample) * (# channels) bytes in frame
*
- * Finally, not all Id CIN creation tools agree on the resolution of the
+ * Finally, not all id CIN creation tools agree on the resolution of the
* color palette, apparently. Some creation tools specify red, green, and
* blue palette components in terms of 6-bit VGA color DAC values which
* range from 0..63. Other tools specify the RGB components as full 8-bit
* transmitting them to the video decoder
*/
+#include "libavutil/channel_layout.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/intreadwrite.h"
#include "avformat.h"
+#include "internal.h"
#define HUFFMAN_TABLE_SIZE (64 * 1024)
-#define FRAME_PTS_INC (90000 / 14)
+#define IDCIN_FPS 14
typedef struct IdcinDemuxContext {
int video_stream_index;
int audio_stream_index;
int audio_chunk_size1;
int audio_chunk_size2;
+ int block_align;
/* demux state variables */
int current_audio_chunk;
int next_chunk_is_video;
int audio_present;
-
- int64_t pts;
-
- AVPaletteControl palctrl;
+ int64_t first_pkt_pos;
} IdcinDemuxContext;
static int idcin_probe(AVProbeData *p)
unsigned int number;
/*
- * This is what you could call a "probabilistic" file check: Id CIN
+ * This is what you could call a "probabilistic" file check: id CIN
* files don't have a definite file signature. In lieu of such a marker,
* perform sanity checks on the 5 32-bit header fields:
* width, height: greater than 0, less than or equal to 1024
* audio channels: 0 for no audio, or 1 or 2
*/
+ /* check we have enough data to do all checks, otherwise the
+ 0-padding may cause a wrong recognition */
+ if (p->buf_size < 20)
+ return 0;
+
/* check the video width */
number = AV_RL32(&p->buf[0]);
if ((number == 0) || (number > 1024))
if (number > 2)
return 0;
- /* return half certainly since this check is a bit sketchy */
- return AVPROBE_SCORE_MAX / 2;
+ /* return half certainty since this check is a bit sketchy */
+ return AVPROBE_SCORE_EXTENSION;
}
-static int idcin_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+static int idcin_read_header(AVFormatContext *s)
{
- ByteIOContext *pb = &s->pb;
- IdcinDemuxContext *idcin = (IdcinDemuxContext *)s->priv_data;
+ AVIOContext *pb = s->pb;
+ IdcinDemuxContext *idcin = s->priv_data;
AVStream *st;
unsigned int width, height;
unsigned int sample_rate, bytes_per_sample, channels;
+ int ret;
/* get the 5 header parameters */
- width = get_le32(pb);
- height = get_le32(pb);
- sample_rate = get_le32(pb);
- bytes_per_sample = get_le32(pb);
- channels = get_le32(pb);
+ width = avio_rl32(pb);
+ height = avio_rl32(pb);
+ sample_rate = avio_rl32(pb);
+ bytes_per_sample = avio_rl32(pb);
+ channels = avio_rl32(pb);
+
+ if (s->pb->eof_reached) {
+ av_log(s, AV_LOG_ERROR, "incomplete header\n");
+ return s->pb->error ? s->pb->error : AVERROR_EOF;
+ }
- st = av_new_stream(s, 0);
+ if (av_image_check_size(width, height, 0, s) < 0)
+ return AVERROR_INVALIDDATA;
+ if (sample_rate > 0) {
+ if (sample_rate < 14 || sample_rate > INT_MAX) {
+ av_log(s, AV_LOG_ERROR, "invalid sample rate: %u\n", sample_rate);
+ return AVERROR_INVALIDDATA;
+ }
+ if (bytes_per_sample < 1 || bytes_per_sample > 2) {
+ av_log(s, AV_LOG_ERROR, "invalid bytes per sample: %u\n",
+ bytes_per_sample);
+ return AVERROR_INVALIDDATA;
+ }
+ if (channels < 1 || channels > 2) {
+ av_log(s, AV_LOG_ERROR, "invalid channels: %u\n", channels);
+ return AVERROR_INVALIDDATA;
+ }
+ idcin->audio_present = 1;
+ } else {
+ /* if sample rate is 0, assume no audio */
+ idcin->audio_present = 0;
+ }
+
+ st = avformat_new_stream(s, NULL);
if (!st)
- return AVERROR_NOMEM;
- av_set_pts_info(st, 33, 1, 90000);
+ return AVERROR(ENOMEM);
+ avpriv_set_pts_info(st, 33, 1, IDCIN_FPS);
+ st->start_time = 0;
idcin->video_stream_index = st->index;
- st->codec->codec_type = CODEC_TYPE_VIDEO;
- st->codec->codec_id = CODEC_ID_IDCIN;
- st->codec->codec_tag = 0; /* no fourcc */
- st->codec->width = width;
- st->codec->height = height;
+ st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codecpar->codec_id = AV_CODEC_ID_IDCIN;
+ st->codecpar->codec_tag = 0; /* no fourcc */
+ st->codecpar->width = width;
+ st->codecpar->height = height;
/* load up the Huffman tables into extradata */
- st->codec->extradata_size = HUFFMAN_TABLE_SIZE;
- st->codec->extradata = av_malloc(HUFFMAN_TABLE_SIZE);
- if (get_buffer(pb, st->codec->extradata, HUFFMAN_TABLE_SIZE) !=
- HUFFMAN_TABLE_SIZE)
- return AVERROR_IO;
- /* save a reference in order to transport the palette */
- st->codec->palctrl = &idcin->palctrl;
-
- /* if sample rate is 0, assume no audio */
- if (sample_rate) {
+ st->codecpar->extradata_size = HUFFMAN_TABLE_SIZE;
+ st->codecpar->extradata = av_malloc(HUFFMAN_TABLE_SIZE);
+ ret = avio_read(pb, st->codecpar->extradata, HUFFMAN_TABLE_SIZE);
+ if (ret < 0) {
+ return ret;
+ } else if (ret != HUFFMAN_TABLE_SIZE) {
+ av_log(s, AV_LOG_ERROR, "incomplete header\n");
+ return AVERROR(EIO);
+ }
+
+ if (idcin->audio_present) {
idcin->audio_present = 1;
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if (!st)
- return AVERROR_NOMEM;
- av_set_pts_info(st, 33, 1, 90000);
+ return AVERROR(ENOMEM);
+ avpriv_set_pts_info(st, 63, 1, sample_rate);
+ st->start_time = 0;
idcin->audio_stream_index = st->index;
- st->codec->codec_type = CODEC_TYPE_AUDIO;
- st->codec->codec_tag = 1;
- st->codec->channels = channels;
- st->codec->sample_rate = sample_rate;
- st->codec->bits_per_sample = bytes_per_sample * 8;
- st->codec->bit_rate = sample_rate * bytes_per_sample * 8 * channels;
- st->codec->block_align = bytes_per_sample * channels;
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codecpar->codec_tag = 1;
+ st->codecpar->channels = channels;
+ st->codecpar->channel_layout = channels > 1 ? AV_CH_LAYOUT_STEREO :
+ AV_CH_LAYOUT_MONO;
+ st->codecpar->sample_rate = sample_rate;
+ st->codecpar->bits_per_coded_sample = bytes_per_sample * 8;
+ st->codecpar->bit_rate = sample_rate * bytes_per_sample * 8 * channels;
+ st->codecpar->block_align = idcin->block_align = bytes_per_sample * channels;
if (bytes_per_sample == 1)
- st->codec->codec_id = CODEC_ID_PCM_U8;
+ st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
else
- st->codec->codec_id = CODEC_ID_PCM_S16LE;
+ st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
if (sample_rate % 14 != 0) {
idcin->audio_chunk_size1 = (sample_rate / 14) *
(sample_rate / 14) * bytes_per_sample * channels;
}
idcin->current_audio_chunk = 0;
- } else
- idcin->audio_present = 1;
+ }
idcin->next_chunk_is_video = 1;
- idcin->pts = 0;
+ idcin->first_pkt_pos = avio_tell(s->pb);
return 0;
}
int ret;
unsigned int command;
unsigned int chunk_size;
- IdcinDemuxContext *idcin = (IdcinDemuxContext *)s->priv_data;
- ByteIOContext *pb = &s->pb;
+ IdcinDemuxContext *idcin = s->priv_data;
+ AVIOContext *pb = s->pb;
int i;
int palette_scale;
unsigned char r, g, b;
unsigned char palette_buffer[768];
+ uint32_t palette[256];
- if (url_feof(&s->pb))
- return AVERROR_IO;
+ if (s->pb->eof_reached)
+ return s->pb->error ? s->pb->error : AVERROR_EOF;
if (idcin->next_chunk_is_video) {
- command = get_le32(pb);
+ command = avio_rl32(pb);
if (command == 2) {
- return AVERROR_IO;
+ return AVERROR(EIO);
} else if (command == 1) {
/* trigger a palette change */
- idcin->palctrl.palette_changed = 1;
- if (get_buffer(pb, palette_buffer, 768) != 768)
- return AVERROR_IO;
+ ret = avio_read(pb, palette_buffer, 768);
+ if (ret < 0) {
+ return ret;
+ } else if (ret != 768) {
+ av_log(s, AV_LOG_ERROR, "incomplete packet\n");
+ return AVERROR(EIO);
+ }
/* scale the palette as necessary */
palette_scale = 2;
for (i = 0; i < 768; i++)
r = palette_buffer[i * 3 ] << palette_scale;
g = palette_buffer[i * 3 + 1] << palette_scale;
b = palette_buffer[i * 3 + 2] << palette_scale;
- idcin->palctrl.palette[i] = (r << 16) | (g << 8) | (b);
+ palette[i] = (r << 16) | (g << 8) | (b);
}
}
- chunk_size = get_le32(pb);
+ if (s->pb->eof_reached) {
+ av_log(s, AV_LOG_ERROR, "incomplete packet\n");
+ return s->pb->error ? s->pb->error : AVERROR_EOF;
+ }
+ chunk_size = avio_rl32(pb);
+ if (chunk_size < 4 || chunk_size > INT_MAX - 4) {
+ av_log(s, AV_LOG_ERROR, "invalid chunk size: %u\n", chunk_size);
+ return AVERROR_INVALIDDATA;
+ }
/* skip the number of decoded bytes (always equal to width * height) */
- url_fseek(pb, 4, SEEK_CUR);
+ avio_skip(pb, 4);
chunk_size -= 4;
ret= av_get_packet(pb, pkt, chunk_size);
- if (ret != chunk_size)
- return AVERROR_IO;
+ if (ret < 0)
+ return ret;
+ else if (ret != chunk_size) {
+ av_log(s, AV_LOG_ERROR, "incomplete packet\n");
+ av_packet_unref(pkt);
+ return AVERROR(EIO);
+ }
+ if (command == 1) {
+ uint8_t *pal;
+
+ pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE,
+ AVPALETTE_SIZE);
+ if (!pal) {
+ av_packet_unref(pkt);
+ return AVERROR(ENOMEM);
+ }
+ memcpy(pal, palette, AVPALETTE_SIZE);
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ }
pkt->stream_index = idcin->video_stream_index;
- pkt->pts = idcin->pts;
+ pkt->duration = 1;
} else {
/* send out the audio chunk */
if (idcin->current_audio_chunk)
else
chunk_size = idcin->audio_chunk_size1;
ret= av_get_packet(pb, pkt, chunk_size);
- if (ret != chunk_size)
- return AVERROR_IO;
+ if (ret < 0)
+ return ret;
pkt->stream_index = idcin->audio_stream_index;
- pkt->pts = idcin->pts;
+ pkt->duration = chunk_size / idcin->block_align;
idcin->current_audio_chunk ^= 1;
- idcin->pts += FRAME_PTS_INC;
}
if (idcin->audio_present)
idcin->next_chunk_is_video ^= 1;
- return ret;
+ return 0;
}
-static int idcin_read_close(AVFormatContext *s)
+static int idcin_read_seek(AVFormatContext *s, int stream_index,
+ int64_t timestamp, int flags)
{
-
- return 0;
+ IdcinDemuxContext *idcin = s->priv_data;
+
+ if (idcin->first_pkt_pos > 0) {
+ int ret = avio_seek(s->pb, idcin->first_pkt_pos, SEEK_SET);
+ if (ret < 0)
+ return ret;
+ ff_update_cur_dts(s, s->streams[idcin->video_stream_index], 0);
+ idcin->next_chunk_is_video = 1;
+ idcin->current_audio_chunk = 0;
+ return 0;
+ }
+ return -1;
}
-AVInputFormat idcin_demuxer = {
- "idcin",
- "Id CIN format",
- sizeof(IdcinDemuxContext),
- idcin_probe,
- idcin_read_header,
- idcin_read_packet,
- idcin_read_close,
+AVInputFormat ff_idcin_demuxer = {
+ .name = "idcin",
+ .long_name = NULL_IF_CONFIG_SMALL("id Cinematic"),
+ .priv_data_size = sizeof(IdcinDemuxContext),
+ .read_probe = idcin_probe,
+ .read_header = idcin_read_header,
+ .read_packet = idcin_read_packet,
+ .read_seek = idcin_read_seek,
+ .flags = AVFMT_NO_BYTE_SEEK,
};
projects / ffmpeg / blobdiff