+++ /dev/null
-/*
- * ASF compatible encoder and decoder.
- * Copyright (c) 2000, 2001 Fabrice Bellard.
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#include "avformat.h"
-#include "avi.h"
-#include "mpegaudio.h"
-
-#define PACKET_SIZE 3200
-#define PACKET_HEADER_SIZE 12
-#define FRAME_HEADER_SIZE 17
-
-typedef struct {
- int num;
- int seq;
- /* use for reading */
- AVPacket pkt;
- int frag_offset;
- int timestamp;
- int64_t duration;
-
- int ds_span; /* descrambling */
- int ds_packet_size;
- int ds_chunk_size;
- int ds_data_size;
- int ds_silence_data;
-
-} ASFStream;
-
-typedef struct {
- uint32_t v1;
- uint16_t v2;
- uint16_t v3;
- uint8_t v4[8];
-} GUID;
-
-typedef struct {
- GUID guid; // generated by client computer
- uint64_t file_size; // in bytes
- // invalid if broadcasting
- uint64_t create_time; // time of creation, in 100-nanosecond units since 1.1.1601
- // invalid if broadcasting
- uint64_t packets_count; // how many packets are there in the file
- // invalid if broadcasting
- uint64_t play_time; // play time, in 100-nanosecond units
- // invalid if broadcasting
- uint64_t send_time; // time to send file, in 100-nanosecond units
- // invalid if broadcasting (could be ignored)
- uint32_t preroll; // timestamp of the first packet, in milliseconds
- // if nonzero - substract from time
- uint32_t ignore; // preroll is 64bit - but let's just ignore it
- uint32_t flags; // 0x01 - broadcast
- // 0x02 - seekable
- // rest is reserved should be 0
- uint32_t min_pktsize; // size of a data packet
- // invalid if broadcasting
- uint32_t max_pktsize; // shall be the same as for min_pktsize
- // invalid if broadcasting
- uint32_t max_bitrate; // bandwith of stream in bps
- // should be the sum of bitrates of the
- // individual media streams
-} ASFMainHeader;
-
-
-typedef struct {
- int seqno;
- int packet_size;
- int is_streamed;
- int asfid2avid[128]; /* conversion table from asf ID 2 AVStream ID */
- ASFStream streams[128]; /* it's max number and it's not that big */
- /* non streamed additonnal info */
- int64_t nb_packets;
- int64_t duration; /* in 100ns units */
- /* packet filling */
- int packet_size_left;
- int packet_timestamp_start;
- int packet_timestamp_end;
- int packet_nb_frames;
- uint8_t packet_buf[PACKET_SIZE];
- ByteIOContext pb;
- /* only for reading */
- uint64_t data_offset; /* begining of the first data packet */
-
- ASFMainHeader hdr;
-
- int packet_flags;
- int packet_property;
- int packet_timestamp;
- int packet_segsizetype;
- int packet_segments;
- int packet_seq;
- int packet_replic_size;
- int packet_key_frame;
- int packet_padsize;
- int packet_frag_offset;
- int packet_frag_size;
- int packet_frag_timestamp;
- int packet_multi_size;
- int packet_obj_size;
- int packet_time_delta;
- int packet_time_start;
-
- int stream_index;
- ASFStream* asf_st; /* currently decoded stream */
-} ASFContext;
-
-static const GUID asf_header = {
- 0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
-};
-
-static const GUID file_header = {
- 0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
-};
-
-static const GUID stream_header = {
- 0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
-};
-
-static const GUID audio_stream = {
- 0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
-};
-
-static const GUID audio_conceal_none = {
- // 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
- // New value lifted from avifile
- 0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },
-};
-
-static const GUID video_stream = {
- 0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
-};
-
-static const GUID video_conceal_none = {
- 0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
-};
-
-
-static const GUID comment_header = {
- 0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
-};
-
-static const GUID codec_comment_header = {
- 0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
-};
-static const GUID codec_comment1_header = {
- 0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
-};
-
-static const GUID data_header = {
- 0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
-};
-
-static const GUID index_guid = {
- 0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
-};
-
-static const GUID head1_guid = {
- 0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
-};
-
-static const GUID head2_guid = {
- 0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
-};
-
-/* I am not a number !!! This GUID is the one found on the PC used to
- generate the stream */
-static const GUID my_guid = {
- 0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
-};
-
-static void put_guid(ByteIOContext *s, const GUID *g)
-{
- int i;
-
- put_le32(s, g->v1);
- put_le16(s, g->v2);
- put_le16(s, g->v3);
- for(i=0;i<8;i++)
- put_byte(s, g->v4[i]);
-}
-
-static void put_str16(ByteIOContext *s, const char *tag)
-{
- int c;
-
- put_le16(s,strlen(tag) + 1);
- for(;;) {
- c = (uint8_t)*tag++;
- put_le16(s, c);
- if (c == '\0')
- break;
- }
-}
-
-static void put_str16_nolen(ByteIOContext *s, const char *tag)
-{
- int c;
-
- for(;;) {
- c = (uint8_t)*tag++;
- put_le16(s, c);
- if (c == '\0')
- break;
- }
-}
-
-static int64_t put_header(ByteIOContext *pb, const GUID *g)
-{
- int64_t pos;
-
- pos = url_ftell(pb);
- put_guid(pb, g);
- put_le64(pb, 24);
- return pos;
-}
-
-/* update header size */
-static void end_header(ByteIOContext *pb, int64_t pos)
-{
- int64_t pos1;
-
- pos1 = url_ftell(pb);
- url_fseek(pb, pos + 16, SEEK_SET);
- put_le64(pb, pos1 - pos);
- url_fseek(pb, pos1, SEEK_SET);
-}
-
-/* write an asf chunk (only used in streaming case) */
-static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
-{
- ASFContext *asf = s->priv_data;
- ByteIOContext *pb = &s->pb;
- int length;
-
- length = payload_length + 8;
- put_le16(pb, type);
- put_le16(pb, length);
- put_le32(pb, asf->seqno);
- put_le16(pb, flags); /* unknown bytes */
- put_le16(pb, length);
- asf->seqno++;
-}
-
-/* convert from unix to windows time */
-static int64_t unix_to_file_time(int ti)
-{
- int64_t t;
-
- t = ti * int64_t_C(10000000);
- t += int64_t_C(116444736000000000);
- return t;
-}
-
-/* write the header (used two times if non streamed) */
-static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
-{
- ASFContext *asf = s->priv_data;
- ByteIOContext *pb = &s->pb;
- int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
- int has_title;
- AVCodecContext *enc;
- int64_t header_offset, cur_pos, hpos;
- int bit_rate;
-
- has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
-
- bit_rate = 0;
- for(n=0;n<s->nb_streams;n++) {
- enc = &s->streams[n]->codec;
-
- bit_rate += enc->bit_rate;
- }
-
- if (asf->is_streamed) {
- put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
- }
-
- put_guid(pb, &asf_header);
- put_le64(pb, -1); /* header length, will be patched after */
- put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
- put_byte(pb, 1); /* ??? */
- put_byte(pb, 2); /* ??? */
-
- /* file header */
- header_offset = url_ftell(pb);
- hpos = put_header(pb, &file_header);
- put_guid(pb, &my_guid);
- put_le64(pb, file_size);
- file_time = 0;
- put_le64(pb, unix_to_file_time(file_time));
- put_le64(pb, asf->nb_packets); /* number of packets */
- put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
- put_le64(pb, asf->duration); /* duration (in 100ns units) */
- put_le32(pb, 0); /* start time stamp */
- put_le32(pb, 0); /* ??? */
- put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
- put_le32(pb, asf->packet_size); /* packet size */
- put_le32(pb, asf->packet_size); /* packet size */
- put_le32(pb, bit_rate); /* Nominal data rate in bps */
- end_header(pb, hpos);
-
- /* unknown headers */
- hpos = put_header(pb, &head1_guid);
- put_guid(pb, &head2_guid);
- put_le32(pb, 6);
- put_le16(pb, 0);
- end_header(pb, hpos);
-
- /* title and other infos */
- if (has_title) {
- hpos = put_header(pb, &comment_header);
- put_le16(pb, 2 * (strlen(s->title) + 1));
- put_le16(pb, 2 * (strlen(s->author) + 1));
- put_le16(pb, 2 * (strlen(s->copyright) + 1));
- put_le16(pb, 2 * (strlen(s->comment) + 1));
- put_le16(pb, 0);
- put_str16_nolen(pb, s->title);
- put_str16_nolen(pb, s->author);
- put_str16_nolen(pb, s->copyright);
- put_str16_nolen(pb, s->comment);
- end_header(pb, hpos);
- }
-
- /* stream headers */
- for(n=0;n<s->nb_streams;n++) {
- int64_t es_pos;
- // ASFStream *stream = &asf->streams[n];
-
- enc = &s->streams[n]->codec;
- asf->streams[n].num = n + 1;
- asf->streams[n].seq = 0;
-
- switch(enc->codec_type) {
- case CODEC_TYPE_AUDIO:
- wav_extra_size = 0;
- extra_size = 18 + wav_extra_size;
- extra_size2 = 0;
- break;
- default:
- case CODEC_TYPE_VIDEO:
- wav_extra_size = 0;
- extra_size = 0x33;
- extra_size2 = 0;
- break;
- }
-
- hpos = put_header(pb, &stream_header);
- if (enc->codec_type == CODEC_TYPE_AUDIO) {
- put_guid(pb, &audio_stream);
- put_guid(pb, &audio_conceal_none);
- } else {
- put_guid(pb, &video_stream);
- put_guid(pb, &video_conceal_none);
- }
- put_le64(pb, 0); /* ??? */
- es_pos = url_ftell(pb);
- put_le32(pb, extra_size); /* wav header len */
- put_le32(pb, extra_size2); /* additional data len */
- put_le16(pb, n + 1); /* stream number */
- put_le32(pb, 0); /* ??? */
-
- if (enc->codec_type == CODEC_TYPE_AUDIO) {
- /* WAVEFORMATEX header */
- int wavsize = put_wav_header(pb, enc);
-
- if (wavsize < 0)
- return -1;
- if (wavsize != extra_size) {
- cur_pos = url_ftell(pb);
- url_fseek(pb, es_pos, SEEK_SET);
- put_le32(pb, wavsize); /* wav header len */
- url_fseek(pb, cur_pos, SEEK_SET);
- }
- } else {
- put_le32(pb, enc->width);
- put_le32(pb, enc->height);
- put_byte(pb, 2); /* ??? */
- put_le16(pb, 40); /* size */
-
- /* BITMAPINFOHEADER header */
- put_bmp_header(pb, enc, codec_bmp_tags, 1);
- }
- end_header(pb, hpos);
- }
-
- /* media comments */
-
- hpos = put_header(pb, &codec_comment_header);
- put_guid(pb, &codec_comment1_header);
- put_le32(pb, s->nb_streams);
- for(n=0;n<s->nb_streams;n++) {
- AVCodec *p;
-
- enc = &s->streams[n]->codec;
- p = avcodec_find_encoder(enc->codec_id);
-
- put_le16(pb, asf->streams[n].num);
- put_str16(pb, p ? p->name : enc->codec_name);
- put_le16(pb, 0); /* no parameters */
-
-
- /* id */
- if (enc->codec_type == CODEC_TYPE_AUDIO) {
- put_le16(pb, 2);
- if(!enc->codec_tag)
- enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
- if(!enc->codec_tag)
- return -1;
- put_le16(pb, enc->codec_tag);
- } else {
- put_le16(pb, 4);
- if(!enc->codec_tag)
- enc->codec_tag = codec_get_tag(codec_bmp_tags, enc->codec_id);
- if(!enc->codec_tag)
- return -1;
- put_le32(pb, enc->codec_tag);
- }
- }
- end_header(pb, hpos);
-
- /* patch the header size fields */
-
- cur_pos = url_ftell(pb);
- header_size = cur_pos - header_offset;
- if (asf->is_streamed) {
- header_size += 8 + 30 + 50;
-
- url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
- put_le16(pb, header_size);
- url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
- put_le16(pb, header_size);
-
- header_size -= 8 + 30 + 50;
- }
- header_size += 24 + 6;
- url_fseek(pb, header_offset - 14, SEEK_SET);
- put_le64(pb, header_size);
- url_fseek(pb, cur_pos, SEEK_SET);
-
- /* movie chunk, followed by packets of packet_size */
- asf->data_offset = cur_pos;
- put_guid(pb, &data_header);
- put_le64(pb, data_chunk_size);
- put_guid(pb, &my_guid);
- put_le64(pb, asf->nb_packets); /* nb packets */
- put_byte(pb, 1); /* ??? */
- put_byte(pb, 1); /* ??? */
- return 0;
-}
-
-static int asf_write_header(AVFormatContext *s)
-{
- ASFContext *asf = s->priv_data;
-
- av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
-
- asf->packet_size = PACKET_SIZE;
- asf->nb_packets = 0;
-
- if (asf_write_header1(s, 0, 50) < 0) {
- //av_free(asf);
- return -1;
- }
-
- put_flush_packet(&s->pb);
-
- asf->packet_nb_frames = 0;
- asf->packet_timestamp_start = -1;
- asf->packet_timestamp_end = -1;
- asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
- init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
- NULL, NULL, NULL, NULL);
-
- return 0;
-}
-
-static int asf_write_stream_header(AVFormatContext *s)
-{
- ASFContext *asf = s->priv_data;
-
- asf->is_streamed = 1;
-
- return asf_write_header(s);
-}
-
-/* write a fixed size packet */
-static int put_packet(AVFormatContext *s,
- unsigned int timestamp, unsigned int duration,
- int nb_frames, int padsize)
-{
- ASFContext *asf = s->priv_data;
- ByteIOContext *pb = &s->pb;
- int flags;
-
- if (asf->is_streamed) {
- put_chunk(s, 0x4424, asf->packet_size, 0);
- }
-
- put_byte(pb, 0x82);
- put_le16(pb, 0);
-
- flags = 0x01; /* nb segments present */
- if (padsize > 0) {
- if (padsize < 256)
- flags |= 0x08;
- else
- flags |= 0x10;
- }
- put_byte(pb, flags); /* flags */
- put_byte(pb, 0x5d);
- if (flags & 0x10)
- put_le16(pb, padsize - 2);
- if (flags & 0x08)
- put_byte(pb, padsize - 1);
- put_le32(pb, timestamp);
- put_le16(pb, duration);
- put_byte(pb, nb_frames | 0x80);
-
- return PACKET_HEADER_SIZE + ((flags & 0x18) >> 3);
-}
-
-static void flush_packet(AVFormatContext *s)
-{
- ASFContext *asf = s->priv_data;
- int hdr_size, ptr;
-
- hdr_size = put_packet(s, asf->packet_timestamp_start,
- asf->packet_timestamp_end - asf->packet_timestamp_start,
- asf->packet_nb_frames, asf->packet_size_left);
-
- /* Clear out the padding bytes */
- ptr = asf->packet_size - hdr_size - asf->packet_size_left;
- memset(asf->packet_buf + ptr, 0, asf->packet_size_left);
-
- put_buffer(&s->pb, asf->packet_buf, asf->packet_size - hdr_size);
-
- put_flush_packet(&s->pb);
- asf->nb_packets++;
- asf->packet_nb_frames = 0;
- asf->packet_timestamp_start = -1;
- asf->packet_timestamp_end = -1;
- asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
- init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
- NULL, NULL, NULL, NULL);
-}
-
-static void put_frame_header(AVFormatContext *s, ASFStream *stream, int timestamp,
- int payload_size, int frag_offset, int frag_len)
-{
- ASFContext *asf = s->priv_data;
- ByteIOContext *pb = &asf->pb;
- int val;
-
- val = stream->num;
- if (s->streams[val - 1]->codec.coded_frame->key_frame /* && frag_offset == 0 */)
- val |= 0x80;
- put_byte(pb, val);
- put_byte(pb, stream->seq);
- put_le32(pb, frag_offset); /* fragment offset */
- put_byte(pb, 0x08); /* flags */
- put_le32(pb, payload_size);
- put_le32(pb, timestamp);
- put_le16(pb, frag_len);
-}
-
-
-/* Output a frame. We suppose that payload_size <= PACKET_SIZE.
-
- It is there that you understand that the ASF format is really
- crap. They have misread the MPEG Systems spec !
- */
-static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
- const uint8_t *buf, int payload_size)
-{
- ASFContext *asf = s->priv_data;
- int frag_pos, frag_len, frag_len1;
-
- frag_pos = 0;
- while (frag_pos < payload_size) {
- frag_len = payload_size - frag_pos;
- frag_len1 = asf->packet_size_left - FRAME_HEADER_SIZE;
- if (frag_len1 > 0) {
- if (frag_len > frag_len1)
- frag_len = frag_len1;
- put_frame_header(s, stream, timestamp+1, payload_size, frag_pos, frag_len);
- put_buffer(&asf->pb, buf, frag_len);
- asf->packet_size_left -= (frag_len + FRAME_HEADER_SIZE);
- asf->packet_timestamp_end = timestamp;
- if (asf->packet_timestamp_start == -1)
- asf->packet_timestamp_start = timestamp;
- asf->packet_nb_frames++;
- } else {
- frag_len = 0;
- }
- frag_pos += frag_len;
- buf += frag_len;
- /* output the frame if filled */
- if (asf->packet_size_left <= FRAME_HEADER_SIZE)
- flush_packet(s);
- }
- stream->seq++;
-}
-
-
-static int asf_write_packet(AVFormatContext *s, int stream_index,
- const uint8_t *buf, int size, int64_t timestamp)
-{
- ASFContext *asf = s->priv_data;
- ASFStream *stream;
- int64_t duration;
- AVCodecContext *codec;
-
- codec = &s->streams[stream_index]->codec;
- stream = &asf->streams[stream_index];
-
- if (codec->codec_type == CODEC_TYPE_AUDIO) {
- duration = (codec->frame_number * codec->frame_size * int64_t_C(10000000)) /
- codec->sample_rate;
- } else {
- duration = av_rescale(codec->frame_number * codec->frame_rate_base, 10000000, codec->frame_rate);
- }
- if (duration > asf->duration)
- asf->duration = duration;
-
- put_frame(s, stream, timestamp, buf, size);
- return 0;
-}
-
-static int asf_write_trailer(AVFormatContext *s)
-{
- ASFContext *asf = s->priv_data;
- int64_t file_size;
-
- /* flush the current packet */
- if (asf->pb.buf_ptr > asf->pb.buffer)
- flush_packet(s);
-
- if (asf->is_streamed) {
- put_chunk(s, 0x4524, 0, 0); /* end of stream */
- } else {
- /* rewrite an updated header */
- file_size = url_ftell(&s->pb);
- url_fseek(&s->pb, 0, SEEK_SET);
- asf_write_header1(s, file_size, file_size - asf->data_offset);
- }
-
- put_flush_packet(&s->pb);
- return 0;
-}
-
-/**********************************/
-/* decoding */
-
-//#define DEBUG
-
-#ifdef DEBUG
-#define PRINT_IF_GUID(g,cmp) \
-if (!memcmp(g, &cmp, sizeof(GUID))) \
- printf("(GUID: %s) ", #cmp)
-
-static void print_guid(const GUID *g)
-{
- int i;
- PRINT_IF_GUID(g, asf_header);
- else PRINT_IF_GUID(g, file_header);
- else PRINT_IF_GUID(g, stream_header);
- else PRINT_IF_GUID(g, audio_stream);
- else PRINT_IF_GUID(g, audio_conceal_none);
- else PRINT_IF_GUID(g, video_stream);
- else PRINT_IF_GUID(g, video_conceal_none);
- else PRINT_IF_GUID(g, comment_header);
- else PRINT_IF_GUID(g, codec_comment_header);
- else PRINT_IF_GUID(g, codec_comment1_header);
- else PRINT_IF_GUID(g, data_header);
- else PRINT_IF_GUID(g, index_guid);
- else PRINT_IF_GUID(g, head1_guid);
- else PRINT_IF_GUID(g, head2_guid);
- else PRINT_IF_GUID(g, my_guid);
- else
- printf("(GUID: unknown) ");
- printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
- for(i=0;i<8;i++)
- printf(" 0x%02x,", g->v4[i]);
- printf("}\n");
-}
-#undef PRINT_IF_GUID(g,cmp)
-#endif
-
-static void get_guid(ByteIOContext *s, GUID *g)
-{
- int i;
-
- g->v1 = get_le32(s);
- g->v2 = get_le16(s);
- g->v3 = get_le16(s);
- for(i=0;i<8;i++)
- g->v4[i] = get_byte(s);
-}
-
-#if 0
-static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
-{
- int len, c;
- char *q;
-
- len = get_le16(pb);
- q = buf;
- while (len > 0) {
- c = get_le16(pb);
- if ((q - buf) < buf_size - 1)
- *q++ = c;
- len--;
- }
- *q = '\0';
-}
-#endif
-
-static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
-{
- int c;
- char *q;
-
- q = buf;
- while (len > 0) {
- c = get_le16(pb);
- if ((q - buf) < buf_size - 1)
- *q++ = c;
- len-=2;
- }
- *q = '\0';
-}
-
-static int asf_probe(AVProbeData *pd)
-{
- GUID g;
- const unsigned char *p;
- int i;
-
- /* check file header */
- if (pd->buf_size <= 32)
- return 0;
- p = pd->buf;
- g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
- p += 4;
- g.v2 = p[0] | (p[1] << 8);
- p += 2;
- g.v3 = p[0] | (p[1] << 8);
- p += 2;
- for(i=0;i<8;i++)
- g.v4[i] = *p++;
-
- if (!memcmp(&g, &asf_header, sizeof(GUID)))
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
-{
- ASFContext *asf = s->priv_data;
- GUID g;
- ByteIOContext *pb = &s->pb;
- AVStream *st;
- ASFStream *asf_st;
- int size, i;
- int64_t gsize;
-
- av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
-
- get_guid(pb, &g);
- if (memcmp(&g, &asf_header, sizeof(GUID)))
- goto fail;
- get_le64(pb);
- get_le32(pb);
- get_byte(pb);
- get_byte(pb);
- memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
- for(;;) {
- get_guid(pb, &g);
- gsize = get_le64(pb);
-#ifdef DEBUG
- printf("%08Lx: ", url_ftell(pb) - 24);
- print_guid(&g);
- printf(" size=0x%Lx\n", gsize);
-#endif
- if (gsize < 24)
- goto fail;
- if (!memcmp(&g, &file_header, sizeof(GUID))) {
- get_guid(pb, &asf->hdr.guid);
- asf->hdr.file_size = get_le64(pb);
- asf->hdr.create_time = get_le64(pb);
- asf->hdr.packets_count = get_le64(pb);
- asf->hdr.play_time = get_le64(pb);
- asf->hdr.send_time = get_le64(pb);
- asf->hdr.preroll = get_le32(pb);
- asf->hdr.ignore = get_le32(pb);
- asf->hdr.flags = get_le32(pb);
- asf->hdr.min_pktsize = get_le32(pb);
- asf->hdr.max_pktsize = get_le32(pb);
- asf->hdr.max_bitrate = get_le32(pb);
- asf->packet_size = asf->hdr.max_pktsize;
- asf->nb_packets = asf->hdr.packets_count;
- } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
- int type, total_size, type_specific_size;
- unsigned int tag1;
- int64_t pos1, pos2;
-
- pos1 = url_ftell(pb);
-
- st = av_new_stream(s, 0);
- if (!st)
- goto fail;
- asf_st = av_mallocz(sizeof(ASFStream));
- if (!asf_st)
- goto fail;
- st->priv_data = asf_st;
- st->start_time = asf->hdr.preroll / (10000000 / AV_TIME_BASE);
- st->duration = (asf->hdr.send_time - asf->hdr.preroll) /
- (10000000 / AV_TIME_BASE);
- get_guid(pb, &g);
- if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
- type = CODEC_TYPE_AUDIO;
- } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
- type = CODEC_TYPE_VIDEO;
- } else {
- goto fail;
- }
- get_guid(pb, &g);
- total_size = get_le64(pb);
- type_specific_size = get_le32(pb);
- get_le32(pb);
- st->id = get_le16(pb) & 0x7f; /* stream id */
- // mapping of asf ID to AV stream ID;
- asf->asfid2avid[st->id] = s->nb_streams - 1;
-
- get_le32(pb);
- st->codec.codec_type = type;
- st->codec.frame_rate = 15 * s->pts_den / s->pts_num; // 15 fps default
- if (type == CODEC_TYPE_AUDIO) {
- get_wav_header(pb, &st->codec, type_specific_size);
- /* We have to init the frame size at some point .... */
- pos2 = url_ftell(pb);
- if (gsize > (pos2 + 8 - pos1 + 24)) {
- asf_st->ds_span = get_byte(pb);
- asf_st->ds_packet_size = get_le16(pb);
- asf_st->ds_chunk_size = get_le16(pb);
- asf_st->ds_data_size = get_le16(pb);
- asf_st->ds_silence_data = get_byte(pb);
- }
- //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
- // asf_st->ds_packet_size, asf_st->ds_chunk_size,
- // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
- if (asf_st->ds_span > 1) {
- if (!asf_st->ds_chunk_size
- || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
- asf_st->ds_span = 0; // disable descrambling
- }
- switch (st->codec.codec_id) {
- case CODEC_ID_MP3:
- st->codec.frame_size = MPA_FRAME_SIZE;
- break;
- case CODEC_ID_PCM_S16LE:
- case CODEC_ID_PCM_S16BE:
- case CODEC_ID_PCM_U16LE:
- case CODEC_ID_PCM_U16BE:
- case CODEC_ID_PCM_S8:
- case CODEC_ID_PCM_U8:
- case CODEC_ID_PCM_ALAW:
- case CODEC_ID_PCM_MULAW:
- st->codec.frame_size = 1;
- break;
- default:
- /* This is probably wrong, but it prevents a crash later */
- st->codec.frame_size = 1;
- break;
- }
- } else {
- get_le32(pb);
- get_le32(pb);
- get_byte(pb);
- size = get_le16(pb); /* size */
- get_le32(pb); /* size */
- st->codec.width = get_le32(pb);
- st->codec.height = get_le32(pb);
- /* not available for asf */
- get_le16(pb); /* panes */
- st->codec.bits_per_sample = get_le16(pb); /* depth */
- tag1 = get_le32(pb);
- url_fskip(pb, 20);
- if (size > 40) {
- st->codec.extradata_size = size - 40;
- st->codec.extradata = av_mallocz(st->codec.extradata_size);
- get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
- }
- st->codec.codec_tag = tag1;
- st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
- }
- pos2 = url_ftell(pb);
- url_fskip(pb, gsize - (pos2 - pos1 + 24));
- } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
- break;
- } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
- int len1, len2, len3, len4, len5;
-
- len1 = get_le16(pb);
- len2 = get_le16(pb);
- len3 = get_le16(pb);
- len4 = get_le16(pb);
- len5 = get_le16(pb);
- get_str16_nolen(pb, len1, s->title, sizeof(s->title));
- get_str16_nolen(pb, len2, s->author, sizeof(s->author));
- get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
- get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
- url_fskip(pb, len5);
-#if 0
- } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
- int v1, v2;
- get_guid(pb, &g);
- v1 = get_le32(pb);
- v2 = get_le16(pb);
- } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
- int len, v1, n, num;
- char str[256], *q;
- char tag[16];
-
- get_guid(pb, &g);
- print_guid(&g);
-
- n = get_le32(pb);
- for(i=0;i<n;i++) {
- num = get_le16(pb); /* stream number */
- get_str16(pb, str, sizeof(str));
- get_str16(pb, str, sizeof(str));
- len = get_le16(pb);
- q = tag;
- while (len > 0) {
- v1 = get_byte(pb);
- if ((q - tag) < sizeof(tag) - 1)
- *q++ = v1;
- len--;
- }
- *q = '\0';
- }
-#endif
- } else if (url_feof(pb)) {
- goto fail;
- } else {
- url_fseek(pb, gsize - 24, SEEK_CUR);
- }
- }
- get_guid(pb, &g);
- get_le64(pb);
- get_byte(pb);
- get_byte(pb);
- if (url_feof(pb))
- goto fail;
- asf->data_offset = url_ftell(pb);
- asf->packet_size_left = 0;
-
- return 0;
-
- fail:
- for(i=0;i<s->nb_streams;i++) {
- AVStream *st = s->streams[i];
- if (st) {
- av_free(st->priv_data);
- av_free(st->codec.extradata);
- }
- av_free(st);
- }
- return -1;
-}
-
-#define DO_2BITS(bits, var, defval) \
- switch (bits & 3) \
- { \
- case 3: var = get_le32(pb); rsize += 4; break; \
- case 2: var = get_le16(pb); rsize += 2; break; \
- case 1: var = get_byte(pb); rsize++; break; \
- default: var = defval; break; \
- }
-
-static int asf_get_packet(AVFormatContext *s)
-{
- ASFContext *asf = s->priv_data;
- ByteIOContext *pb = &s->pb;
- uint32_t packet_length, padsize;
- int rsize = 11;
- int c = get_byte(pb);
- if (c != 0x82) {
- if (!url_feof(pb))
- printf("ff asf bad header %x at:%lld\n", c, url_ftell(pb));
- return -EIO;
- }
- if ((c & 0x0f) == 2) { // always true for now
- if (get_le16(pb) != 0) {
- if (!url_feof(pb))
- printf("ff asf bad non zero\n");
- return -EIO;
- }
- }
-
- asf->packet_flags = get_byte(pb);
- asf->packet_property = get_byte(pb);
-
- DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
- DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
- DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
-
- asf->packet_timestamp = get_le32(pb);
- get_le16(pb); /* duration */
- // rsize has at least 11 bytes which have to be present
-
- if (asf->packet_flags & 0x01) {
- asf->packet_segsizetype = get_byte(pb); rsize++;
- asf->packet_segments = asf->packet_segsizetype & 0x3f;
- } else {
- asf->packet_segments = 1;
- asf->packet_segsizetype = 0x80;
- }
- asf->packet_size_left = packet_length - padsize - rsize;
- if (packet_length < asf->hdr.min_pktsize)
- padsize += asf->hdr.min_pktsize - packet_length;
- asf->packet_padsize = padsize;
-#ifdef DEBUG
- printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
-#endif
- return 0;
-}
-
-static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- ASFContext *asf = s->priv_data;
- ASFStream *asf_st = 0;
- ByteIOContext *pb = &s->pb;
- //static int pc = 0;
- for (;;) {
- int rsize = 0;
- if (asf->packet_size_left < FRAME_HEADER_SIZE
- || asf->packet_segments < 1) {
- //asf->packet_size_left <= asf->packet_padsize) {
- int ret = asf->packet_size_left + asf->packet_padsize;
- //printf("PacketLeftSize:%d Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
- /* fail safe */
- url_fskip(pb, ret);
- ret = asf_get_packet(s);
- //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
- if (ret < 0 || url_feof(pb))
- return -EIO;
- asf->packet_time_start = 0;
- continue;
- }
- if (asf->packet_time_start == 0) {
- /* read frame header */
- int num = get_byte(pb);
- asf->packet_segments--;
- rsize++;
- asf->packet_key_frame = (num & 0x80) >> 7;
- asf->stream_index = asf->asfid2avid[num & 0x7f];
- // sequence should be ignored!
- DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
- DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
- DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
-
- if (asf->packet_replic_size > 1) {
- // it should be always at least 8 bytes - FIXME validate
- asf->packet_obj_size = get_le32(pb);
- asf->packet_frag_timestamp = get_le32(pb); // timestamp
- if (asf->packet_replic_size > 8)
- url_fskip(pb, asf->packet_replic_size - 8);
- rsize += asf->packet_replic_size; // FIXME - check validity
- } else {
- // multipacket - frag_offset is begining timestamp
- asf->packet_time_start = asf->packet_frag_offset;
- asf->packet_frag_offset = 0;
- asf->packet_frag_timestamp = asf->packet_timestamp;
-
- if (asf->packet_replic_size == 1) {
- asf->packet_time_delta = get_byte(pb);
- rsize++;
- }
- }
- if (asf->packet_flags & 0x01) {
- DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
-#undef DO_2BITS
- //printf("Fragsize %d\n", asf->packet_frag_size);
- } else {
- asf->packet_frag_size = asf->packet_size_left - rsize;
- //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
- }
- if (asf->packet_replic_size == 1) {
- asf->packet_multi_size = asf->packet_frag_size;
- if (asf->packet_multi_size > asf->packet_size_left) {
- asf->packet_segments = 0;
- continue;
- }
- }
- asf->packet_size_left -= rsize;
- //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
-
- if (asf->stream_index < 0) {
- asf->packet_time_start = 0;
- /* unhandled packet (should not happen) */
- url_fskip(pb, asf->packet_frag_size);
- asf->packet_size_left -= asf->packet_frag_size;
- printf("ff asf skip %d %d\n", asf->packet_frag_size, num & 0x7f);
- continue;
- }
- asf->asf_st = s->streams[asf->stream_index]->priv_data;
- }
- asf_st = asf->asf_st;
-
- if ((asf->packet_frag_offset != asf_st->frag_offset
- || (asf->packet_frag_offset
- && asf->packet_seq != asf_st->seq)) // seq should be ignored
- ) {
- /* cannot continue current packet: free it */
- // FIXME better check if packet was already allocated
- printf("ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
- asf_st->pkt.size,
- asf->packet_obj_size,
- asf->packet_frag_offset, asf_st->frag_offset,
- asf->packet_seq, asf_st->seq, asf->packet_frag_size);
- if (asf_st->pkt.size)
- av_free_packet(&asf_st->pkt);
- asf_st->frag_offset = 0;
- if (asf->packet_frag_offset != 0) {
- url_fskip(pb, asf->packet_frag_size);
- printf("ff asf parser skiping %db\n", asf->packet_frag_size);
- asf->packet_size_left -= asf->packet_frag_size;
- continue;
- }
- }
- if (asf->packet_replic_size == 1) {
- // frag_offset is here used as the begining timestamp
- asf->packet_frag_timestamp = asf->packet_time_start;
- asf->packet_time_start += asf->packet_time_delta;
- asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
- asf->packet_size_left--;
- asf->packet_multi_size--;
- if (asf->packet_multi_size < asf->packet_obj_size)
- {
- asf->packet_time_start = 0;
- url_fskip(pb, asf->packet_multi_size);
- asf->packet_size_left -= asf->packet_multi_size;
- continue;
- }
- asf->packet_multi_size -= asf->packet_obj_size;
- //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
- }
- if (asf_st->frag_offset == 0) {
- /* new packet */
- av_new_packet(&asf_st->pkt, asf->packet_obj_size);
- asf_st->seq = asf->packet_seq;
- asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
- asf_st->pkt.stream_index = asf->stream_index;
- if (asf->packet_key_frame)
- asf_st->pkt.flags |= PKT_FLAG_KEY;
- }
-
- /* read data */
- //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
- // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
- // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
- asf->packet_size_left -= asf->packet_frag_size;
- if (asf->packet_size_left < 0)
- continue;
- get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
- asf->packet_frag_size);
- asf_st->frag_offset += asf->packet_frag_size;
- /* test if whole packet is read */
- if (asf_st->frag_offset == asf_st->pkt.size) {
- /* return packet */
- if (asf_st->ds_span > 1) {
- /* packet descrambling */
- char* newdata = av_malloc(asf_st->pkt.size);
- if (newdata) {
- int offset = 0;
- while (offset < asf_st->pkt.size) {
- int off = offset / asf_st->ds_chunk_size;
- int row = off / asf_st->ds_span;
- int col = off % asf_st->ds_span;
- int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
- //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
- memcpy(newdata + offset,
- asf_st->pkt.data + idx * asf_st->ds_chunk_size,
- asf_st->ds_chunk_size);
- offset += asf_st->ds_chunk_size;
- }
- av_free(asf_st->pkt.data);
- asf_st->pkt.data = newdata;
- }
- }
- asf_st->frag_offset = 0;
- memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
- //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
- asf_st->pkt.size = 0;
- asf_st->pkt.data = 0;
- break; // packet completed
- }
- }
- return 0;
-}
-
-static int asf_read_close(AVFormatContext *s)
-{
- int i;
-
- for(i=0;i<s->nb_streams;i++) {
- AVStream *st = s->streams[i];
- av_free(st->priv_data);
- av_free(st->codec.extradata);
- }
- return 0;
-}
-
-static int asf_read_seek(AVFormatContext *s, int64_t pts)
-{
- printf("SEEK TO %lld", pts);
- return -1;
-}
-
-static AVInputFormat asf_iformat = {
- "asf",
- "asf format",
- sizeof(ASFContext),
- asf_probe,
- asf_read_header,
- asf_read_packet,
- asf_read_close,
- asf_read_seek,
-};
-
-static AVOutputFormat asf_oformat = {
- "asf",
- "asf format",
- "video/x-ms-asf",
- "asf,wmv",
- sizeof(ASFContext),
-#ifdef CONFIG_MP3LAME
- CODEC_ID_MP3,
-#else
- CODEC_ID_MP2,
-#endif
- CODEC_ID_MSMPEG4V3,
- asf_write_header,
- asf_write_packet,
- asf_write_trailer,
-};
-
-static AVOutputFormat asf_stream_oformat = {
- "asf_stream",
- "asf format",
- "video/x-ms-asf",
- "asf,wmv",
- sizeof(ASFContext),
-#ifdef CONFIG_MP3LAME
- CODEC_ID_MP3,
-#else
- CODEC_ID_MP2,
-#endif
- CODEC_ID_MSMPEG4V3,
- asf_write_stream_header,
- asf_write_packet,
- asf_write_trailer,
-};
-
-int asf_init(void)
-{
- av_register_input_format(&asf_iformat);
- av_register_output_format(&asf_oformat);
- av_register_output_format(&asf_stream_oformat);
- return 0;
-}
projects / synfig.git / blobdiff