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THP PCM decoder, used on the Nintendo GameCube.
patch by Marco Gerards, mgerards xs4all nl Originally committed as revision 8646 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Marco Gerards
Diego Biurrun
parent
efd2afc2ae
commit
d1e0d21f94
@ -902,7 +902,7 @@ library:
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@tab This format is used in non-Windows version of Feeble Files game and
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different game cutscenes repacked for use with ScummVM.
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@item THP @tab @tab X
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@tab Used on the Nintendo GameCube (video only)
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@tab Used on the Nintendo GameCube.
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@item C93 @tab @tab X
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@tab Used in the game Cyberia from Interplay.
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@end multitable
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@ -250,6 +250,7 @@ OBJS-$(CONFIG_ADPCM_SBPRO_4_DECODER) += adpcm.o
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OBJS-$(CONFIG_ADPCM_SBPRO_4_ENCODER) += adpcm.o
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OBJS-$(CONFIG_ADPCM_SWF_DECODER) += adpcm.o
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OBJS-$(CONFIG_ADPCM_SWF_ENCODER) += adpcm.o
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OBJS-$(CONFIG_ADPCM_THP_DECODER) += adpcm.o
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OBJS-$(CONFIG_ADPCM_XA_DECODER) += adpcm.o
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OBJS-$(CONFIG_ADPCM_XA_ENCODER) += adpcm.o
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OBJS-$(CONFIG_ADPCM_YAMAHA_DECODER) += adpcm.o
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@ -29,6 +29,7 @@
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* by Mike Melanson (melanson@pcisys.net)
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* CD-ROM XA ADPCM codec by BERO
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* EA ADPCM decoder by Robin Kay (komadori@myrealbox.com)
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* THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl)
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*
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* Features and limitations:
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*
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@ -1308,6 +1309,72 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
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src++;
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}
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break;
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case CODEC_ID_ADPCM_THP:
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{
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GetBitContext gb;
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int table[16][2];
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unsigned int samplecnt;
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int prev1[2], prev2[2];
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int ch;
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if (buf_size < 80) {
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av_log(avctx, AV_LOG_ERROR, "frame too small\n");
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return -1;
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}
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init_get_bits(&gb, src, buf_size * 8);
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src += buf_size;
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get_bits_long(&gb, 32); /* Channel size */
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samplecnt = get_bits_long(&gb, 32);
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for (ch = 0; ch < 2; ch++)
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for (i = 0; i < 16; i++)
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table[i][ch] = get_sbits(&gb, 16);
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/* Initialize the previous sample. */
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for (ch = 0; ch < 2; ch++) {
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prev1[ch] = get_sbits(&gb, 16);
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prev2[ch] = get_sbits(&gb, 16);
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}
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if (samplecnt >= (samples_end - samples) / (st + 1)) {
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av_log(avctx, AV_LOG_ERROR, "allocated output buffer is too small\n");
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return -1;
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}
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for (ch = 0; ch <= st; ch++) {
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samples = (unsigned short *) data + ch;
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/* Read in every sample for this channel. */
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for (i = 0; i < samplecnt / 14; i++) {
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uint8_t index = get_bits (&gb, 4) & 7;
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unsigned int exp = get_bits (&gb, 4);
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int factor1 = table[index * 2][ch];
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int factor2 = table[index * 2 + 1][ch];
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/* Decode 14 samples. */
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for (n = 0; n < 14; n++) {
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int sampledat = get_sbits (&gb, 4);
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*samples = ((prev1[ch]*factor1
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+ prev2[ch]*factor2) >> 11) + (sampledat << exp);
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prev2[ch] = prev1[ch];
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prev1[ch] = *samples++;
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/* In case of stereo, skip one sample, this sample
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is for the other channel. */
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samples += st;
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}
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}
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}
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/* In the previous loop, in case stereo is used, samples is
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increased exactly one time too often. */
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samples -= st;
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break;
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}
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default:
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return -1;
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}
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@ -1368,5 +1435,6 @@ ADPCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
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ADPCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
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ADPCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
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ADPCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
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ADPCM_CODEC(CODEC_ID_ADPCM_THP, adpcm_thp);
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#undef ADPCM_CODEC
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@ -244,6 +244,7 @@ void avcodec_register_all(void)
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REGISTER_ENCDEC (ADPCM_SBPRO_3, adpcm_sbpro_3);
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REGISTER_ENCDEC (ADPCM_SBPRO_4, adpcm_sbpro_4);
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REGISTER_ENCDEC (ADPCM_SWF, adpcm_swf);
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REGISTER_DECODER(ADPCM_THP, adpcm_thp);
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REGISTER_ENCDEC (ADPCM_XA, adpcm_xa);
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REGISTER_ENCDEC (ADPCM_YAMAHA, adpcm_yamaha);
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@ -200,6 +200,7 @@ enum CodecID {
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CODEC_ID_ADPCM_SBPRO_4,
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CODEC_ID_ADPCM_SBPRO_3,
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CODEC_ID_ADPCM_SBPRO_2,
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CODEC_ID_ADPCM_THP,
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/* AMR */
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CODEC_ID_AMR_NB= 0x12000,
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@ -2417,6 +2418,7 @@ PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
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PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
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PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
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PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
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PCM_CODEC(CODEC_ID_ADPCM_THP, adpcm_thp);
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PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
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PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
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@ -35,10 +35,12 @@ typedef struct ThpDemuxContext {
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int next_frame;
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int next_framesz;
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int video_stream_index;
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int audio_stream_index;
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int compcount;
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unsigned char components[16];
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AVStream* vst;
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int has_audio;
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int audiosize;
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} ThpDemuxContext;
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@ -116,7 +118,23 @@ static int thp_read_header(AVFormatContext *s,
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get_be32(pb); /* Unknown. */
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}
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else if (thp->components[i] == 1) {
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/* XXX: Required for audio playback. */
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if (thp->has_audio != 0)
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break;
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/* Audio component. */
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR_NOMEM;
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st->codec->codec_type = CODEC_TYPE_AUDIO;
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st->codec->codec_id = CODEC_ID_ADPCM_THP;
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st->codec->codec_tag = 0; /* no fourcc */
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st->codec->channels = get_be32(pb); /* numChannels. */
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st->codec->sample_rate = get_be32(pb); /* Frequency. */
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av_set_pts_info(st, 64, 1, st->codec->sample_rate);
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thp->audio_stream_index = st->index;
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thp->has_audio = 1;
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}
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}
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@ -132,6 +150,8 @@ static int thp_read_packet(AVFormatContext *s,
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int size;
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int ret;
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if (thp->audiosize == 0) {
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/* Terminate when last frame is reached. */
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if (thp->frame >= thp->framecnt)
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return AVERROR_IO;
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@ -145,8 +165,12 @@ static int thp_read_packet(AVFormatContext *s,
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get_be32(pb); /* Previous total size. */
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size = get_be32(pb); /* Total size of this frame. */
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/* Store the audiosize so the next time this function is called,
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the audio can be read. */
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if (thp->has_audio)
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get_be32(pb); /* Audio size. */
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thp->audiosize = get_be32(pb); /* Audio size. */
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else
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thp->frame++;
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ret = av_get_packet(pb, pkt, size);
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if (ret != size) {
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@ -155,7 +179,18 @@ static int thp_read_packet(AVFormatContext *s,
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}
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pkt->stream_index = thp->video_stream_index;
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thp->frame++;
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}
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else {
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ret = av_get_packet(pb, pkt, thp->audiosize);
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if (ret != thp->audiosize) {
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av_free_packet(pkt);
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return AVERROR_IO;
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}
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pkt->stream_index = thp->audio_stream_index;
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thp->audiosize = 0;
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thp->frame++;
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}
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return 0;
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}
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