* Interplay MVE 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 libavformat/ipmovie.c
+ * @file
* Interplay MVE file demuxer
* by Mike Melanson (melanson@pcisys.net)
* For more information regarding the Interplay MVE file format, visit:
unsigned int video_width;
unsigned int video_height;
int64_t video_pts;
+ uint32_t palette[256];
+ int has_palette;
unsigned int audio_bits;
unsigned int audio_channels;
int64_t next_chunk_offset;
- AVPaletteControl palette_control;
-
} IPMVEContext;
-static int load_ipmovie_packet(IPMVEContext *s, ByteIOContext *pb,
+static int load_ipmovie_packet(IPMVEContext *s, AVIOContext *pb,
AVPacket *pkt) {
int chunk_type;
s->audio_chunk_size -= 6;
}
- url_fseek(pb, s->audio_chunk_offset, SEEK_SET);
+ avio_seek(pb, s->audio_chunk_offset, SEEK_SET);
s->audio_chunk_offset = 0;
if (s->audio_chunk_size != av_get_packet(pb, pkt, s->audio_chunk_size))
if (av_new_packet(pkt, s->decode_map_chunk_size + s->video_chunk_size))
return CHUNK_NOMEM;
+ if (s->has_palette) {
+ uint8_t *pal;
+
+ pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE,
+ AVPALETTE_SIZE);
+ if (pal) {
+ memcpy(pal, s->palette, AVPALETTE_SIZE);
+ s->has_palette = 0;
+ }
+ }
+
pkt->pos= s->decode_map_chunk_offset;
- url_fseek(pb, s->decode_map_chunk_offset, SEEK_SET);
+ avio_seek(pb, s->decode_map_chunk_offset, SEEK_SET);
s->decode_map_chunk_offset = 0;
- if (get_buffer(pb, pkt->data, s->decode_map_chunk_size) !=
+ if (avio_read(pb, pkt->data, s->decode_map_chunk_size) !=
s->decode_map_chunk_size) {
av_free_packet(pkt);
return CHUNK_EOF;
}
- url_fseek(pb, s->video_chunk_offset, SEEK_SET);
+ avio_seek(pb, s->video_chunk_offset, SEEK_SET);
s->video_chunk_offset = 0;
- if (get_buffer(pb, pkt->data + s->decode_map_chunk_size,
+ if (avio_read(pb, pkt->data + s->decode_map_chunk_size,
s->video_chunk_size) != s->video_chunk_size) {
av_free_packet(pkt);
return CHUNK_EOF;
} else {
- url_fseek(pb, s->next_chunk_offset, SEEK_SET);
+ avio_seek(pb, s->next_chunk_offset, SEEK_SET);
chunk_type = CHUNK_DONE;
}
/* This function loads and processes a single chunk in an IP movie file.
* It returns the type of chunk that was processed. */
-static int process_ipmovie_chunk(IPMVEContext *s, ByteIOContext *pb,
+static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
AVPacket *pkt)
{
unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
return chunk_type;
/* read the next chunk, wherever the file happens to be pointing */
- if (url_feof(pb))
+ if (pb->eof_reached)
return CHUNK_EOF;
- if (get_buffer(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
+ if (avio_read(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
CHUNK_PREAMBLE_SIZE)
return CHUNK_BAD;
chunk_size = AV_RL16(&chunk_preamble[0]);
while ((chunk_size > 0) && (chunk_type != CHUNK_BAD)) {
/* read the next chunk, wherever the file happens to be pointing */
- if (url_feof(pb)) {
+ if (pb->eof_reached) {
chunk_type = CHUNK_EOF;
break;
}
- if (get_buffer(pb, opcode_preamble, CHUNK_PREAMBLE_SIZE) !=
+ if (avio_read(pb, opcode_preamble, CHUNK_PREAMBLE_SIZE) !=
CHUNK_PREAMBLE_SIZE) {
chunk_type = CHUNK_BAD;
break;
case OPCODE_END_OF_STREAM:
debug_ipmovie("end of stream\n");
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
case OPCODE_END_OF_CHUNK:
debug_ipmovie("end of chunk\n");
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
case OPCODE_CREATE_TIMER:
chunk_type = CHUNK_BAD;
break;
}
- if (get_buffer(pb, scratch, opcode_size) !=
+ if (avio_read(pb, scratch, opcode_size) !=
opcode_size) {
chunk_type = CHUNK_BAD;
break;
chunk_type = CHUNK_BAD;
break;
}
- if (get_buffer(pb, scratch, opcode_size) !=
+ if (avio_read(pb, scratch, opcode_size) !=
opcode_size) {
chunk_type = CHUNK_BAD;
break;
case OPCODE_START_STOP_AUDIO:
debug_ipmovie("start/stop audio\n");
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
case OPCODE_INIT_VIDEO_BUFFERS:
chunk_type = CHUNK_BAD;
break;
}
- if (get_buffer(pb, scratch, opcode_size) !=
+ if (avio_read(pb, scratch, opcode_size) !=
opcode_size) {
chunk_type = CHUNK_BAD;
break;
case OPCODE_UNKNOWN_14:
case OPCODE_UNKNOWN_15:
debug_ipmovie("unknown (but documented) opcode %02X\n", opcode_type);
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
case OPCODE_SEND_BUFFER:
debug_ipmovie("send buffer\n");
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
case OPCODE_AUDIO_FRAME:
debug_ipmovie("audio frame\n");
/* log position and move on for now */
- s->audio_chunk_offset = url_ftell(pb);
+ s->audio_chunk_offset = avio_tell(pb);
s->audio_chunk_size = opcode_size;
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
case OPCODE_SILENCE_FRAME:
debug_ipmovie("silence frame\n");
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
case OPCODE_INIT_VIDEO_MODE:
debug_ipmovie("initialize video mode\n");
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
case OPCODE_CREATE_GRADIENT:
debug_ipmovie("create gradient\n");
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
case OPCODE_SET_PALETTE:
chunk_type = CHUNK_BAD;
break;
}
- if (get_buffer(pb, scratch, opcode_size) != opcode_size) {
+ if (avio_read(pb, scratch, opcode_size) != opcode_size) {
chunk_type = CHUNK_BAD;
break;
}
r = scratch[j++] * 4;
g = scratch[j++] * 4;
b = scratch[j++] * 4;
- s->palette_control.palette[i] = (r << 16) | (g << 8) | (b);
+ s->palette[i] = (r << 16) | (g << 8) | (b);
}
- /* indicate a palette change */
- s->palette_control.palette_changed = 1;
+ s->has_palette = 1;
break;
case OPCODE_SET_PALETTE_COMPRESSED:
debug_ipmovie("set palette compressed\n");
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
case OPCODE_SET_DECODING_MAP:
debug_ipmovie("set decoding map\n");
/* log position and move on for now */
- s->decode_map_chunk_offset = url_ftell(pb);
+ s->decode_map_chunk_offset = avio_tell(pb);
s->decode_map_chunk_size = opcode_size;
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
case OPCODE_VIDEO_DATA:
debug_ipmovie("set video data\n");
/* log position and move on for now */
- s->video_chunk_offset = url_ftell(pb);
+ s->video_chunk_offset = avio_tell(pb);
s->video_chunk_size = opcode_size;
- url_fseek(pb, opcode_size, SEEK_CUR);
+ avio_skip(pb, opcode_size);
break;
default:
}
/* make a note of where the stream is sitting */
- s->next_chunk_offset = url_ftell(pb);
+ s->next_chunk_offset = avio_tell(pb);
/* dispatch the first of any pending packets */
if ((chunk_type == CHUNK_VIDEO) || (chunk_type == CHUNK_AUDIO_ONLY))
AVFormatParameters *ap)
{
IPMVEContext *ipmovie = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
AVPacket pkt;
AVStream *st;
unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
int chunk_type;
uint8_t signature_buffer[sizeof(signature)];
- get_buffer(pb, signature_buffer, sizeof(signature_buffer));
+ avio_read(pb, signature_buffer, sizeof(signature_buffer));
while (memcmp(signature_buffer, signature, sizeof(signature))) {
memmove(signature_buffer, signature_buffer + 1, sizeof(signature_buffer) - 1);
- signature_buffer[sizeof(signature_buffer) - 1] = get_byte(pb);
- if (url_feof(pb))
+ signature_buffer[sizeof(signature_buffer) - 1] = avio_r8(pb);
+ if (pb->eof_reached)
return AVERROR_EOF;
}
/* initialize private context members */
ipmovie->decode_map_chunk_offset = 0;
/* on the first read, this will position the stream at the first chunk */
- ipmovie->next_chunk_offset = url_ftell(pb) + 4;
+ ipmovie->next_chunk_offset = avio_tell(pb) + 4;
/* process the first chunk which should be CHUNK_INIT_VIDEO */
if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_VIDEO)
/* peek ahead to the next chunk-- if it is an init audio chunk, process
* it; if it is the first video chunk, this is a silent file */
- if (get_buffer(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
+ if (avio_read(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
CHUNK_PREAMBLE_SIZE)
return AVERROR(EIO);
chunk_type = AV_RL16(&chunk_preamble[2]);
- url_fseek(pb, -CHUNK_PREAMBLE_SIZE, SEEK_CUR);
+ avio_seek(pb, -CHUNK_PREAMBLE_SIZE, SEEK_CUR);
if (chunk_type == CHUNK_VIDEO)
ipmovie->audio_type = CODEC_ID_NONE; /* no audio */
st->codec->height = ipmovie->video_height;
st->codec->bits_per_coded_sample = ipmovie->video_bpp;
- /* palette considerations */
- st->codec->palctrl = &ipmovie->palette_control;
-
if (ipmovie->audio_type) {
st = av_new_stream(s, 0);
if (!st)
AVPacket *pkt)
{
IPMVEContext *ipmovie = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
int ret;
ret = process_ipmovie_chunk(ipmovie, pb, pkt);
return ret;
}
-AVInputFormat ipmovie_demuxer = {
+AVInputFormat ff_ipmovie_demuxer = {
"ipmovie",
NULL_IF_CONFIG_SMALL("Interplay MVE format"),
sizeof(IPMVEContext),
projects / ffmpeg / blobdiff