* Copyright (c) 2004 The ffmpeg Project
* Copyright (c) 2006-2008 Peter Ross
*
- * 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
*/
int num_samples;
} EaDemuxContext;
-static uint32_t read_arbitary(ByteIOContext *pb) {
+static uint32_t read_arbitary(AVIOContext *pb) {
uint8_t size, byte;
int i;
uint32_t word;
- size = get_byte(pb);
+ size = avio_r8(pb);
word = 0;
for (i = 0; i < size; i++) {
- byte = get_byte(pb);
+ byte = avio_r8(pb);
word <<= 8;
word |= byte;
}
{
int inHeader = 1;
EaDemuxContext *ea = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
int compression_type = -1, revision = -1, revision2 = -1;
ea->bytes = 2;
ea->sample_rate = -1;
ea->num_channels = 1;
- while (inHeader) {
+ while (!pb->eof_reached && inHeader) {
int inSubheader;
uint8_t byte;
- byte = get_byte(pb);
+ byte = avio_r8(pb);
switch (byte) {
case 0xFD:
av_log (s, AV_LOG_DEBUG, "entered audio subheader\n");
inSubheader = 1;
- while (inSubheader) {
+ while (!pb->eof_reached && inSubheader) {
uint8_t subbyte;
- subbyte = get_byte(pb);
+ subbyte = avio_r8(pb);
switch (subbyte) {
case 0x80:
static int process_audio_header_eacs(AVFormatContext *s)
{
EaDemuxContext *ea = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
int compression_type;
- ea->sample_rate = ea->big_endian ? get_be32(pb) : get_le32(pb);
- ea->bytes = get_byte(pb); /* 1=8-bit, 2=16-bit */
- ea->num_channels = get_byte(pb);
- compression_type = get_byte(pb);
- url_fskip(pb, 13);
+ ea->sample_rate = ea->big_endian ? avio_rb32(pb) : avio_rl32(pb);
+ ea->bytes = avio_r8(pb); /* 1=8-bit, 2=16-bit */
+ ea->num_channels = avio_r8(pb);
+ compression_type = avio_r8(pb);
+ avio_skip(pb, 13);
switch (compression_type) {
case 0:
static int process_audio_header_sead(AVFormatContext *s)
{
EaDemuxContext *ea = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
- ea->sample_rate = get_le32(pb);
- ea->bytes = get_le32(pb); /* 1=8-bit, 2=16-bit */
- ea->num_channels = get_le32(pb);
+ ea->sample_rate = avio_rl32(pb);
+ ea->bytes = avio_rl32(pb); /* 1=8-bit, 2=16-bit */
+ ea->num_channels = avio_rl32(pb);
ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_SEAD;
return 1;
static int process_video_header_mdec(AVFormatContext *s)
{
EaDemuxContext *ea = s->priv_data;
- ByteIOContext *pb = s->pb;
- url_fskip(pb, 4);
- ea->width = get_le16(pb);
- ea->height = get_le16(pb);
+ AVIOContext *pb = s->pb;
+ avio_skip(pb, 4);
+ ea->width = avio_rl16(pb);
+ ea->height = avio_rl16(pb);
ea->time_base = (AVRational){1,15};
ea->video_codec = CODEC_ID_MDEC;
return 1;
static int process_video_header_vp6(AVFormatContext *s)
{
EaDemuxContext *ea = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
- url_fskip(pb, 16);
- ea->time_base.den = get_le32(pb);
- ea->time_base.num = get_le32(pb);
+ avio_skip(pb, 16);
+ ea->time_base.den = avio_rl32(pb);
+ ea->time_base.num = avio_rl32(pb);
ea->video_codec = CODEC_ID_VP6;
return 1;
static int process_ea_header(AVFormatContext *s) {
uint32_t blockid, size = 0;
EaDemuxContext *ea = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
int i;
for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
- unsigned int startpos = url_ftell(pb);
+ unsigned int startpos = avio_tell(pb);
int err = 0;
- blockid = get_le32(pb);
- size = get_le32(pb);
+ blockid = avio_rl32(pb);
+ size = avio_rl32(pb);
if (i == 0)
ea->big_endian = size > 0x000FFFFF;
if (ea->big_endian)
switch (blockid) {
case ISNh_TAG:
- if (get_le32(pb) != EACS_TAG) {
+ if (avio_rl32(pb) != EACS_TAG) {
av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
return 0;
}
case SCHl_TAG :
case SHEN_TAG :
- blockid = get_le32(pb);
+ blockid = avio_rl32(pb);
if (blockid == GSTR_TAG) {
- url_fskip(pb, 4);
+ avio_skip(pb, 4);
} else if ((blockid & 0xFFFF)!=PT00_TAG) {
av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
return 0;
return err;
}
- url_fseek(pb, startpos + size, SEEK_SET);
+ avio_seek(pb, startpos + size, SEEK_SET);
}
- url_fseek(pb, 0, SEEK_SET);
+ avio_seek(pb, 0, SEEK_SET);
return 1;
}
}
if (ea->audio_codec) {
+ if (ea->num_channels <= 0) {
+ av_log(s, AV_LOG_WARNING, "Unsupported number of channels: %d\n", ea->num_channels);
+ ea->audio_codec = 0;
+ return 1;
+ }
+ if (ea->sample_rate <= 0) {
+ av_log(s, AV_LOG_ERROR, "Unsupported sample rate: %d\n", ea->sample_rate);
+ ea->audio_codec = 0;
+ return 1;
+ }
+
/* initialize the audio decoder stream */
st = av_new_stream(s, 0);
if (!st)
AVPacket *pkt)
{
EaDemuxContext *ea = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
int ret = 0;
int packet_read = 0;
unsigned int chunk_type, chunk_size;
int av_uninit(num_samples);
while (!packet_read) {
- chunk_type = get_le32(pb);
- chunk_size = (ea->big_endian ? get_be32(pb) : get_le32(pb)) - 8;
+ chunk_type = avio_rl32(pb);
+ chunk_size = (ea->big_endian ? avio_rb32(pb) : avio_rl32(pb)) - 8;
switch (chunk_type) {
/* audio data */
case ISNh_TAG:
/* header chunk also contains data; skip over the header portion*/
- url_fskip(pb, 32);
+ avio_skip(pb, 32);
chunk_size -= 32;
case ISNd_TAG:
case SCDl_TAG:
case SNDC_TAG:
case SDEN_TAG:
if (!ea->audio_codec) {
- url_fskip(pb, chunk_size);
+ avio_skip(pb, chunk_size);
break;
} else if (ea->audio_codec == CODEC_ID_PCM_S16LE_PLANAR ||
ea->audio_codec == CODEC_ID_MP3) {
- num_samples = get_le32(pb);
- url_fskip(pb, 8);
+ num_samples = avio_rl32(pb);
+ avio_skip(pb, 8);
chunk_size -= 12;
}
ret = av_get_packet(pb, pkt, chunk_size);
case fVGT_TAG:
case MADm_TAG:
case MADe_TAG:
- url_fseek(pb, -8, SEEK_CUR); // include chunk preamble
+ avio_seek(pb, -8, SEEK_CUR); // include chunk preamble
chunk_size += 8;
goto get_video_packet;
case mTCD_TAG:
- url_fseek(pb, 8, SEEK_CUR); // skip ea dct header
+ avio_skip(pb, 8); // skip ea dct header
chunk_size -= 8;
goto get_video_packet;
break;
default:
- url_fseek(pb, chunk_size, SEEK_CUR);
+ avio_skip(pb, chunk_size);
break;
}
}
return ret;
}
-AVInputFormat ea_demuxer = {
+AVInputFormat ff_ea_demuxer = {
"ea",
NULL_IF_CONFIG_SMALL("Electronic Arts Multimedia Format"),
sizeof(EaDemuxContext),
projects / ffmpeg / blobdiff