X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=ogg_afh.c;h=93ad14bbf9c0b5cbade554fbf22103ef460956fa;hp=4b44ea16664948da6cd52adca357b5cb037c3223;hb=bab99bab677988723afe14a7d680e6d5cc7ddda4;hpb=b0fe6d882dd35b01360a66e130d6714aff7b6a0d diff --git a/ogg_afh.c b/ogg_afh.c index 4b44ea16..93ad14bb 100644 --- a/ogg_afh.c +++ b/ogg_afh.c @@ -1,13 +1,7 @@ -/* - * Copyright (C) 2004-2010 Andre Noll - * - * Licensed under the GPL v2. For licencing details see COPYING. - */ +/* Copyright (C) 2004 Andre Noll , see file COPYING. */ -/** \file ogg_afh.c Audio format handler for ogg vorbis files. */ +/** \file ogg_afh.c Audio format handler for ogg/vorbis files. */ -#include -#include #include #include @@ -15,186 +9,178 @@ #include "afh.h" #include "error.h" #include "string.h" +#include "ogg_afh_common.h" + +struct private_vorbis_data { + vorbis_info vi; + vorbis_comment vc; +}; -/* Taken from decoder_example.c of libvorbis-1.2.3. */ -static int read_vorbis_comment(ogg_sync_state *oss, ogg_stream_state *stream, - vorbis_info *vi, vorbis_comment *vc) +/* + * Vorbis uses three header packets, all of which are required: the + * identification header, the comments header, and the setup header. + * + * The identification header identifies the bitstream as Vorbis. It contains + * the Vorbis version and simple audio characteristics of the stream such as + * sample rate and number of channels. + * + * The comment header includes user text comments (tags) and a vendor string + * for the application/library that produced the bitstream. + * + * The setup header includes extensive CODEC setup information as well as the + * complete VQ and Huffman codebooks needed for decoding. + */ +static int vorbis_packet_callback(ogg_packet *packet, int packet_num, + __a_unused int serial, struct afh_info *afhi, void *private_data) { - ogg_page page; - ogg_packet packet; - int i = 0; - - while (i < 2) { - while (i < 2) { - int ret = ogg_sync_pageout(oss, &page); - if (ret == 0) - break; /* Need more data */ - if (ret != 1) - continue; - /* - * We can ignore any errors here as they'll also become - * apparent at packetout. - */ - ogg_stream_pagein(stream, &page); - while (i < 2) { - ret = ogg_stream_packetout(stream, &packet); - if (ret == 0) - break; - if (ret < 0) - return -E_STREAM_PACKETOUT; - ret = vorbis_synthesis_headerin(vi, vc, - &packet); - if (ret < 0) - return -E_VORBIS; - i++; - } - } + struct private_vorbis_data *pvd = private_data; + + if (vorbis_synthesis_headerin(&pvd->vi, &pvd->vc, packet) < 0) + return -E_VORBIS; + if (packet_num == 0) { + if (pvd->vi.rate == 0) + return -E_VORBIS; + afhi->channels = pvd->vi.channels; + afhi->frequency = pvd->vi.rate; + afhi->bitrate = pvd->vi.bitrate_nominal / 1000; + PARA_DEBUG_LOG("channels: %i, sampling rate: %i, bitrate: %i\n", + afhi->channels, afhi->frequency, afhi->bitrate); + return 1; } - return 1; + if (packet_num == 1) + return 1; /* we also want to have packet #2 */ + afhi->tags.artist = para_strdup(vorbis_comment_query(&pvd->vc, "artist", 0)); + afhi->tags.title = para_strdup(vorbis_comment_query(&pvd->vc, "title", 0)); + afhi->tags.album = para_strdup(vorbis_comment_query(&pvd->vc, "album", 0)); + afhi->tags.year = para_strdup(vorbis_comment_query(&pvd->vc, "year", 0)); + afhi->tags.comment = para_strdup(vorbis_comment_query(&pvd->vc, "comment", 0)); + return 0; } -static int read_vorbis_info(ogg_sync_state *oss, struct afh_info *afhi) +static int ogg_vorbis_get_file_info(char *map, size_t numbytes, __a_unused int fd, + struct afh_info *afhi) { - vorbis_comment vc; - vorbis_info vi; - ogg_packet packet; - ogg_stream_state stream; - ogg_page page; int ret; + struct private_vorbis_data pvd; + struct oac_callback_info vorbis_callback_info = { + .packet_callback = vorbis_packet_callback, + .private_data = &pvd, + }; + + vorbis_info_init(&pvd.vi); + vorbis_comment_init(&pvd.vc); + ret = oac_get_file_info(map, numbytes, afhi, &vorbis_callback_info); + vorbis_info_clear(&pvd.vi); + vorbis_comment_clear(&pvd.vc); + return ret; +} - vorbis_info_init(&vi); - vorbis_comment_init(&vc); - - ret = -E_SYNC_PAGEOUT; - if (ogg_sync_pageout(oss, &page) != 1) - goto out; - - ret = ogg_page_serialno(&page); - ogg_stream_init(&stream, ret); - - ret = -E_STREAM_PAGEIN; - if (ogg_stream_pagein(&stream, &page) < 0) - goto out; - - ret = -E_STREAM_PACKETOUT; - if (ogg_stream_packetout(&stream, &packet) != 1) - goto out; - - ret = -E_VORBIS; - if (vorbis_synthesis_headerin(&vi, &vc, &packet) < 0) - goto out; - if (vi.rate == 0) - goto out; - afhi->channels = vi.channels; - afhi->frequency = vi.rate; - afhi->bitrate = vi.bitrate_nominal / 1000; - PARA_DEBUG_LOG("channels: %i, sampling rate: %i, bitrate: %i\n", - afhi->channels, afhi->frequency, afhi->bitrate); - ret = read_vorbis_comment(oss, &stream, &vi, &vc); +static int vorbis_get_header_callback(ogg_packet *packet, int packet_num, + int serial, __a_unused struct afh_info *afhi, void *private_data) +{ + int ret; + struct oac_custom_header *h = private_data; + static unsigned char dummy_packet[] = { + 0x03, + 'v', 'o', 'r', 'b', 'i', 's', + 0x06, 0x00, 0x00, 0x00, + 'd', 'u', 'm', 'm', 'y', '\0', + 0x00, 0x00, 0x00, 0x00, /* no comment :) */ + 0xff /* framing bit */ + }; + + PARA_DEBUG_LOG("processing ogg packet #%d\n", packet_num); + if (packet_num == 0) { + oac_custom_header_init(serial, h); + ret = oac_custom_header_append(packet, h); + if (ret < 0) + return ret; + oac_custom_header_flush(h); + return 1; + } + if (packet_num == 1) { + ogg_packet replacement = *packet; + PARA_INFO_LOG("replacing metadata packet\n"); + replacement.packet = dummy_packet; + replacement.bytes = sizeof(dummy_packet); + ret = oac_custom_header_append(&replacement, h); + return ret < 0? ret : 1; + } + assert(packet_num == 2); + ret = oac_custom_header_append(packet, h); if (ret < 0) - goto out; - afhi->tags.artist = para_strdup(vorbis_comment_query(&vc, "artist", 0)); - afhi->tags.title = para_strdup(vorbis_comment_query(&vc, "title", 0)); - afhi->tags.album = para_strdup(vorbis_comment_query(&vc, "album", 0)); - afhi->tags.year = para_strdup(vorbis_comment_query(&vc, "year", 0)); - afhi->tags.comment = para_strdup(vorbis_comment_query(&vc, "comment", 0)); - - afhi->header_offset = 0; - afhi->header_len = oss->returned; - ret = 1; -out: - vorbis_info_clear(&vi); - vorbis_comment_clear(&vc); - //ogg_stream_clear(&stream); - return ret; + return ret; + oac_custom_header_flush(h); + return 0; +} + +static void vorbis_get_header(void *map, size_t mapsize, char **buf, + size_t *len) +{ + int ret; + struct oac_custom_header *h = oac_custom_header_new(); + struct oac_callback_info cb = { + .packet_callback = vorbis_get_header_callback, + .private_data = h, + }; + + ret = oac_get_file_info(map, mapsize, NULL, &cb); + *len = oac_custom_header_get(buf, h); + if (ret < 0) { + PARA_ERROR_LOG("could not create ogg/vorbis header: %s\n", + para_strerror(-ret)); + free(*buf); + *buf = NULL; + *len = 0; + } else + PARA_INFO_LOG("created %zu byte ogg vorbis header\n", *len); } -static void set_chunk_tv(int num_frames, int num_chunks, int frequency, - struct timeval *result) +static int vorbis_make_meta_packet(struct taginfo *tags, ogg_packet *result) { - uint64_t x = (uint64_t)num_frames * 1000 * 1000 - / frequency / num_chunks; + vorbis_comment vc; + int ret; - result->tv_sec = x / 1000 / 1000; - result->tv_usec = x % (1000 * 1000); - PARA_INFO_LOG("%d chunks, chunk time: %lums\n", num_chunks, - tv2ms(result)); + vorbis_comment_init(&vc); + vorbis_comment_add_tag(&vc, "artist", tags->artist); + vorbis_comment_add_tag(&vc, "title", tags->title); + vorbis_comment_add_tag(&vc, "album", tags->album); + vorbis_comment_add_tag(&vc, "year", tags->year); + vorbis_comment_add_tag(&vc, "comment", tags->comment); + ret = vorbis_commentheader_out(&vc, result); + vorbis_comment_clear(&vc); + if (ret != 0) + return -E_VORBIS_COMMENTHEADER; + return 1; } -/* Write tech data to given audio format handler struct. */ -static int ogg_get_file_info(char *map, size_t numbytes, __a_unused int fd, - struct afh_info *afhi) +static int vorbis_rewrite_tags(const char *map, size_t mapsize, + struct taginfo *tags, int output_fd, + __a_unused const char *filename) { - ogg_sync_state oss; - ogg_page op; - long len = numbytes; - char *buf; - int ret, i, j, frames_per_chunk, ct_size; - long long unsigned num_frames = 0; - - ogg_sync_init(&oss); - ret = -E_OGG_SYNC; - buf = ogg_sync_buffer(&oss, len); - if (!buf) - goto out; - memcpy(buf, map, len); - ret = -E_OGG_SYNC; - if (ogg_sync_wrote(&oss, len) < 0) - goto out; - ret = read_vorbis_info(&oss, afhi); + int ret; + ogg_packet packet; + + ret = vorbis_make_meta_packet(tags, &packet); if (ret < 0) - goto out; - oss.returned = 0; - oss.fill = numbytes; - /* count ogg packages and get duration of the file */ - for (i = 0; ogg_sync_pageseek(&oss, &op) > 0; i++) - num_frames = ogg_page_granulepos(&op); - PARA_INFO_LOG("%d pages, %llu frames\n", i, num_frames); - ret = -E_OGG_EMPTY; - if (i == 0) - goto out; - afhi->seconds_total = num_frames / afhi->frequency; - /* use roughly one page per chunk */ - frames_per_chunk = num_frames / i; - PARA_INFO_LOG("%lu seconds, %d frames/chunk\n", - afhi->seconds_total, frames_per_chunk); - ct_size = 250; - afhi->chunk_table = para_malloc(ct_size * sizeof(uint32_t)); - afhi->chunk_table[0] = 0; - afhi->chunk_table[1] = afhi->header_len; - oss.returned = afhi->header_len; - oss.fill = numbytes; - for (i = 0, j = 1; ogg_sync_pageseek(&oss, &op) > 0; i++) { - int granule = ogg_page_granulepos(&op); - - while (granule > j * frames_per_chunk) { - j++; - if (j >= ct_size) { - ct_size *= 2; - afhi->chunk_table = para_realloc( - afhi->chunk_table, - ct_size * sizeof(uint32_t)); - } - afhi->chunk_table[j] = oss.returned; - } - } - afhi->chunks_total = j; - set_chunk_tv(num_frames, j, afhi->frequency, &afhi->chunk_tv); - ret = 0; -out: - ogg_sync_clear(&oss); + return ret; + ret = oac_rewrite_tags(map, mapsize, output_fd, (char *)packet.packet, + packet.bytes); + free(packet.packet); return ret; } -static const char* ogg_suffixes[] = {"ogg", NULL}; +static const char * const ogg_suffixes[] = {"ogg", NULL}; /** * The init function of the ogg vorbis audio format handler. * * \param afh Pointer to the struct to initialize. */ -void ogg_init(struct audio_format_handler *afh) +void ogg_afh_init(struct audio_format_handler *afh) { - afh->get_file_info = ogg_get_file_info, + afh->get_file_info = ogg_vorbis_get_file_info; + afh->get_header = vorbis_get_header; afh->suffixes = ogg_suffixes; + afh->rewrite_tags = vorbis_rewrite_tags; }