static av_cold int decode_init(AVCodecContext *avctx)
{
IffContext *s = avctx->priv_data;
int err;
if (avctx->bits_per_coded_sample <= 8) {
avctx->pix_fmt = PIX_FMT_PAL8;
} else if (avctx->bits_per_coded_sample <= 32) {
avctx->pix_fmt = PIX_FMT_BGR32;
} else {
return AVERROR_INVALIDDATA;
}
s->planesize = avctx->width >> 3;
s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE);
if (!s->planebuf)
return AVERROR(ENOMEM);
s->frame.reference = 1;
if ((err = avctx->get_buffer(avctx, &s->frame) < 0)) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return err;
}
return avctx->bits_per_coded_sample <= 8 ?
ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1]) : 0;
}
static int iff_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
IffDemuxContext *iff = s->priv_data;
ByteIOContext *pb = s->pb;
AVStream *st = s->streams[0];
int ret;
if(iff->sent_bytes >= iff->body_size)
return AVERROR(EIO);
if(s->streams[0]->codec->channels == 2) {
uint8_t sample_buffer[PACKET_SIZE];
ret = get_buffer(pb, sample_buffer, PACKET_SIZE);
if(av_new_packet(pkt, PACKET_SIZE) < 0) {
av_log(s, AV_LOG_ERROR, "iff: cannot allocate packet \n");
return AVERROR(ENOMEM);
}
interleave_stereo(sample_buffer, pkt->data, PACKET_SIZE);
} else if (s->streams[0]->codec->codec_id == CODEC_ID_RAWVIDEO) {
if(av_new_packet(pkt, iff->body_size + AVPALETTE_SIZE) < 0) {
return AVERROR(ENOMEM);
}
ret = ff_cmap_read_palette(st->codec, (uint32_t*)(pkt->data + iff->body_size));
if (ret < 0)
return ret;
av_freep(&st->codec->extradata);
st->codec->extradata_size = 0;
ret = get_buffer(pb, pkt->data, iff->body_size);
} else if (s->streams[0]->codec->codec_type == CODEC_TYPE_VIDEO) {
ret = av_get_packet(pb, pkt, iff->body_size);
} else {
ret = av_get_packet(pb, pkt, PACKET_SIZE);
}
if(iff->sent_bytes == 0)
pkt->flags |= PKT_FLAG_KEY;
if(s->streams[0]->codec->codec_type == CODEC_TYPE_AUDIO) {
iff->sent_bytes += PACKET_SIZE;
} else {
iff->sent_bytes = iff->body_size;
}
pkt->stream_index = 0;
if(s->streams[0]->codec->codec_type == CODEC_TYPE_AUDIO) {
pkt->pts = iff->audio_frame_count;
iff->audio_frame_count += ret / s->streams[0]->codec->channels;
}
return ret;
}
