* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "parser.h"
-
-#if CONFIG_DOLBY_E_PARSER | CONFIG_DOLBY_E_DECODER
-
+#include "dolby_e.h"
#include "get_bits.h"
#include "put_bits.h"
-#include "dolby_e_parser.h"
-#include "dolby_e_parser_internal.h"
-
-static int skip_input(DBEContext *s, int nb_words)
-{
- if (nb_words > s->input_size) {
- return AVERROR_INVALIDDATA;
- }
-
- s->input += nb_words * s->word_bytes;
- s->input_size -= nb_words;
- return 0;
-}
-
-static int parse_key(DBEContext *s)
-{
- if (s->key_present) {
- const uint8_t *key = s->input;
- int ret = skip_input(s, 1);
- if (ret < 0)
- return ret;
- return AV_RB24(key) >> 24 - s->word_bits;
- }
- return 0;
-}
-
-static int convert_input(DBEContext *s, int nb_words, int key)
-{
- const uint8_t *src = s->input;
- uint8_t *dst = s->buffer;
- PutBitContext pb;
- int i;
- av_assert0(nb_words <= 1024u);
-
- if (nb_words > s->input_size) {
- return AVERROR_INVALIDDATA;
- }
-
- switch (s->word_bits) {
- case 16:
- for (i = 0; i < nb_words; i++, src += 2, dst += 2)
- AV_WB16(dst, AV_RB16(src) ^ key);
- break;
- case 20:
- init_put_bits(&pb, s->buffer, sizeof(s->buffer));
- for (i = 0; i < nb_words; i++, src += 3)
- put_bits(&pb, 20, AV_RB24(src) >> 4 ^ key);
- flush_put_bits(&pb);
- break;
- case 24:
- for (i = 0; i < nb_words; i++, src += 3, dst += 3)
- AV_WB24(dst, AV_RB24(src) ^ key);
- break;
- default:
- av_assert0(0);
- }
-
- return init_get_bits(&s->gb, s->buffer, nb_words * s->word_bits);
-}
-
-int ff_dolby_e_parse_init(DBEContext *s, const uint8_t *buf, int buf_size)
-{
- int hdr;
-
- if (buf_size < 3)
- return AVERROR_INVALIDDATA;
-
- hdr = AV_RB24(buf);
- if ((hdr & 0xfffffe) == 0x7888e) {
- s->word_bits = 24;
- } else if ((hdr & 0xffffe0) == 0x788e0) {
- s->word_bits = 20;
- } else if ((hdr & 0xfffe00) == 0x78e00) {
- s->word_bits = 16;
- } else {
- if (s->avctx)
- av_log(s->avctx, AV_LOG_ERROR, "Invalid frame header\n");
- return AVERROR_INVALIDDATA;
- }
-
- s->word_bytes = s->word_bits + 7 >> 3;
- s->input = buf + s->word_bytes;
- s->input_size = buf_size / s->word_bytes - 1;
- s->key_present = hdr >> 24 - s->word_bits & 1;
-
- return 0;
-}
-
-int ff_dolby_e_parse_header(DBEContext *s, DolbyEHeaderInfo *hdr)
-{
- int i, ret, key, mtd_size;
-
- if ((key = parse_key(s)) < 0)
- return key;
- if ((ret = convert_input(s, 1, key)) < 0)
- return ret;
-
- skip_bits(&s->gb, 4);
- mtd_size = get_bits(&s->gb, 10);
- if (!mtd_size) {
- if (s->avctx)
- av_log(s->avctx, AV_LOG_ERROR, "Invalid metadata size\n");
- return AVERROR_INVALIDDATA;
- }
-
- if ((ret = convert_input(s, mtd_size, key)) < 0)
- return ret;
-
- skip_bits(&s->gb, 14);
- hdr->prog_conf = get_bits(&s->gb, 6);
- if (hdr->prog_conf > MAX_PROG_CONF) {
- if (s->avctx)
- av_log(s->avctx, AV_LOG_ERROR, "Invalid program configuration\n");
- return AVERROR_INVALIDDATA;
- }
-
- hdr->nb_channels = nb_channels_tab[hdr->prog_conf];
- hdr->nb_programs = nb_programs_tab[hdr->prog_conf];
-
- hdr->fr_code = get_bits(&s->gb, 4);
- hdr->fr_code_orig = get_bits(&s->gb, 4);
- if (!sample_rate_tab[hdr->fr_code] ||
- !sample_rate_tab[hdr->fr_code_orig]) {
- if (s->avctx)
- av_log(s->avctx, AV_LOG_ERROR, "Invalid frame rate code\n");
- return AVERROR_INVALIDDATA;
- }
-
- skip_bits_long(&s->gb, 88);
- for (i = 0; i < hdr->nb_channels; i++)
- hdr->ch_size[i] = get_bits(&s->gb, 10);
- hdr->mtd_ext_size = get_bits(&s->gb, 8);
- hdr->meter_size = get_bits(&s->gb, 8);
-
- skip_bits_long(&s->gb, 10 * hdr->nb_programs);
- for (i = 0; i < hdr->nb_channels; i++) {
- hdr->rev_id[i] = get_bits(&s->gb, 4);
- skip_bits1(&s->gb);
- hdr->begin_gain[i] = get_bits(&s->gb, 10);
- hdr->end_gain[i] = get_bits(&s->gb, 10);
- }
-
- if (get_bits_left(&s->gb) < 0) {
- if (s->avctx)
- av_log(s->avctx, AV_LOG_ERROR, "Read past end of metadata\n");
- return AVERROR_INVALIDDATA;
- }
-
- return skip_input(s, mtd_size + 1);
-}
-#endif /* CONFIG_DOLBY_E_PARSER | CONFIG_DOLBY_E_DECODER */
-
-#if CONFIG_DOLBY_E_PARSER
+typedef struct DBEParseContext {
+ DBEContext dectx;
+} DBEParseContext;
static int dolby_e_parse(AVCodecParserContext *s2, AVCodecContext *avctx,
const uint8_t **poutbuf, int *poutbuf_size,
DBEContext *s = &s1->dectx;
int ret;
- if ((ret = ff_dolby_e_parse_init(s, buf, buf_size)) < 0)
- goto end;
-
- if ((ret = ff_dolby_e_parse_header(s, &s1->metadata)) < 0)
+ if ((ret = ff_dolby_e_parse_header(s, buf, buf_size)) < 0)
goto end;
s2->duration = FRAME_SAMPLES;
- switch (s1->metadata.nb_channels) {
+ switch (s->metadata.nb_channels) {
case 4:
avctx->channel_layout = AV_CH_LAYOUT_4POINT0;
break;
break;
}
- avctx->channels = s1->metadata.nb_channels;
- avctx->sample_rate = sample_rate_tab[s1->metadata.fr_code];
+ avctx->channels = s->metadata.nb_channels;
+ avctx->sample_rate = s->metadata.sample_rate;
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
end:
return buf_size;
}
-AVCodecParser ff_dolby_e_parser = {
+const AVCodecParser ff_dolby_e_parser = {
.codec_ids = { AV_CODEC_ID_DOLBY_E },
.priv_data_size = sizeof(DBEParseContext),
.parser_parse = dolby_e_parse,
- .parser_close = ff_parse_close,
};
-#endif /* CONFIG_DOLBY_E_PARSER */
projects / ffmpeg / blobdiff